Strict Standards: Non-static method Cache::get() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/package.php on line 84

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Strict Standards: Non-static method Cache::getLibrary() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/cache.php on line 122

Strict Standards: Non-static method Loader::package() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/startup/packages.php on line 8

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Strict Standards: Non-static method Loader::package() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/startup/packages.php on line 8

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Strict Standards: Non-static method Loader::package() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/startup/packages.php on line 8

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Strict Standards: Non-static method Events::getInstance() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/events.php on line 98

Strict Standards: Non-static method Events::getInstance() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/events.php on line 180

Strict Standards: Non-static method Loader::package() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/startup/packages.php on line 8

Strict Standards: Non-static method Object::camelcase() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/loader.php on line 290

Strict Standards: Non-static method Loader::package() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/startup/packages.php on line 8

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Strict Standards: Non-static method User::checkUserForeverCookie() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/startup/user.php on line 4

Strict Standards: Non-static method Config::get() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/startup/maintenance_mode_check.php on line 5

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Strict Standards: Non-static method PermissionsCache::getIdentifier() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 15

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Strict Standards: Non-static method Cache::key() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/cache.php on line 117

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Strict Standards: Non-static method Cache::getLibrary() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/cache.php on line 122

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Strict Standards: Declaration of TextareaAttributeTypeController::saveKey() should be compatible with AttributeTypeController::saveKey() in /home/richardharo/hsi-engineering.com/concrete/models/attribute/types/textarea/controller.php on line 128

Strict Standards: Declaration of TextareaAttributeTypeController::duplicateKey() should be compatible with AttributeTypeController::duplicateKey() in /home/richardharo/hsi-engineering.com/concrete/models/attribute/types/textarea/controller.php on line 128

Strict Standards: Non-static method Cache::get() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/attribute/categories/collection.php on line 73

Strict Standards: Non-static method Cache::key() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/cache.php on line 117

Strict Standards: Non-static method Cache::getLibrary() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/cache.php on line 122

Strict Standards: Non-static method Loader::db() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/attribute/type.php on line 11

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Strict Standards: Non-static method Cache::key() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/cache.php on line 117

Strict Standards: Non-static method Cache::getLibrary() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/cache.php on line 122

Strict Standards: Non-static method Loader::db() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/attribute/type.php on line 11

Strict Standards: Declaration of BooleanAttributeTypeController::saveKey() should be compatible with AttributeTypeController::saveKey() in /home/richardharo/hsi-engineering.com/concrete/models/attribute/types/boolean/controller.php on line 137

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Strict Standards: Non-static method Loader::helper() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/startup/process.php on line 28

Strict Standards: Non-static method Object::camelcase() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/loader.php on line 250

Strict Standards: Non-static method Events::getInstance() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/events.php on line 130

Strict Standards: Non-static method View::getInstance() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/dispatcher.php on line 273

Strict Standards: Non-static method Events::getInstance() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/events.php on line 130

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Strict Standards: Non-static method Events::getInstance() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/events.php on line 130

Strict Standards: Non-static method Package::getByHandle() should not be called statically in /home/richardharo/hsi-engineering.com/packages/page_password/models/PagePassword.php on line 8

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Strict Standards: Non-static method Loader::package() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/package.php on line 568

Strict Standards: Non-static method Object::camelcase() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/loader.php on line 290

Strict Standards: Non-static method Loader::db() should not be called statically in /home/richardharo/hsi-engineering.com/packages/page_password/models/PagePassword.php on line 55

Warning: Cannot modify header information - headers already sent by (output started at /home/richardharo/hsi-engineering.com/concrete/models/package.php:84) in /home/richardharo/hsi-engineering.com/concrete/libraries/view.php on line 841

Strict Standards: Non-static method Events::getInstance() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/events.php on line 130
HSI Engineering :: Technical Library
Strict Standards: Non-static method Cache::get() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/page.php on line 24

Strict Standards: Non-static method Cache::key() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/cache.php on line 117

Strict Standards: Non-static method Cache::getLibrary() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/cache.php on line 122

Strict Standards: Non-static method Loader::db() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/collection_version.php on line 38

Strict Standards: Non-static method PermissionsCache::exists() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 69

Strict Standards: Non-static method PermissionsCache::getIdentifier() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 15

Strict Standards: Non-static method Loader::db() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/task_permission.php on line 67

Strict Standards: Non-static method PermissionsCache::exists() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 69

Strict Standards: Non-static method PermissionsCache::getIdentifier() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 15

Strict Standards: Non-static method PermissionsCache::getObject() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 70

Strict Standards: Non-static method PermissionsCache::getIdentifier() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 45

Strict Standards: Non-static method Area::getOrCreate() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/block.php on line 59

Strict Standards: Non-static method Area::get() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/area.php on line 160

Strict Standards: Non-static method Cache::get() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/area.php on line 127

Strict Standards: Non-static method Cache::key() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/cache.php on line 117

Strict Standards: Non-static method Cache::get() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/block.php on line 63

Strict Standards: Non-static method Cache::key() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/cache.php on line 117

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Strict Standards: Non-static method PermissionsCache::exists() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 69

Strict Standards: Non-static method PermissionsCache::getIdentifier() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 15

Strict Standards: Non-static method PermissionsCache::getObject() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 70

Strict Standards: Non-static method PermissionsCache::getIdentifier() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 45

Strict Standards: Non-static method Area::getOrCreate() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/block.php on line 59

Strict Standards: Non-static method Area::get() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/area.php on line 160

Strict Standards: Non-static method Cache::get() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/area.php on line 127

Strict Standards: Non-static method Cache::key() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/cache.php on line 117

Strict Standards: Non-static method Cache::get() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/block.php on line 63

Strict Standards: Non-static method Cache::key() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/cache.php on line 117

Strict Standards: Non-static method PermissionsCache::exists() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 69

Strict Standards: Non-static method PermissionsCache::getIdentifier() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 15

Strict Standards: Non-static method PermissionsCache::getObject() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 70

Strict Standards: Non-static method PermissionsCache::getIdentifier() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 45

Strict Standards: Non-static method Cache::get() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/package.php on line 61

Strict Standards: Non-static method Cache::key() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/cache.php on line 117

Strict Standards: Non-static method Cache::get() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/package.php on line 61

Strict Standards: Non-static method Cache::key() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/cache.php on line 117

Strict Standards: Non-static method Cache::get() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/package.php on line 61

Strict Standards: Non-static method Cache::key() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/cache.php on line 117

Strict Standards: Non-static method Cache::get() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/package.php on line 61

Strict Standards: Non-static method Cache::key() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/cache.php on line 117

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Strict Standards: Non-static method Cache::key() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/cache.php on line 117

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Strict Standards: Non-static method Cache::get() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/package.php on line 61

Strict Standards: Non-static method Cache::key() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/cache.php on line 117

Strict Standards: Non-static method Loader::db() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/collection_version.php on line 38

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Strict Standards: Non-static method Loader::db() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/collection_version.php on line 38

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Strict Standards: Non-static method Loader::db() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/collection_version.php on line 38

Strict Standards: Non-static method Loader::helper() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/startup/autoload.php on line 4

Strict Standards: Non-static method Object::camelcase() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/loader.php on line 250

Strict Standards: Non-static method Loader::db() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/attribute/type.php on line 98

Strict Standards: Declaration of SelectAttributeTypeController::exportValue() should be compatible with AttributeTypeController::exportValue(SimpleXMLElement $akv) in /home/richardharo/hsi-engineering.com/concrete/models/attribute/types/select/controller.php on line 506

Strict Standards: Declaration of SelectAttributeTypeController::saveKey() should be compatible with AttributeTypeController::saveKey() in /home/richardharo/hsi-engineering.com/concrete/models/attribute/types/select/controller.php on line 506

Strict Standards: Declaration of SelectAttributeTypeController::duplicateKey() should be compatible with AttributeTypeController::duplicateKey() in /home/richardharo/hsi-engineering.com/concrete/models/attribute/types/select/controller.php on line 506

Strict Standards: Non-static method Loader::db() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/collection_version.php on line 38

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Strict Standards: Non-static method Loader::db() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/collection_version.php on line 38

Strict Standards: Non-static method Loader::db() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/collection_version.php on line 38

Strict Standards: Non-static method Loader::db() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/collection_version.php on line 38

Strict Standards: Non-static method PermissionsCache::exists() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 69

Strict Standards: Non-static method PermissionsCache::getIdentifier() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 15

Strict Standards: Non-static method Loader::db() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/collection_version.php on line 38

Strict Standards: Non-static method Loader::db() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/collection_version.php on line 38

Strict Standards: Non-static method Loader::db() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/collection_version.php on line 38

Strict Standards: Non-static method Loader::db() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/collection_version.php on line 38

Strict Standards: Non-static method Loader::db() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/collection_version.php on line 38

Strict Standards: Non-static method Loader::db() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/collection_version.php on line 38

Strict Standards: Non-static method Loader::db() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/collection_version.php on line 38

Strict Standards: Non-static method PermissionsCache::exists() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 69

Strict Standards: Non-static method PermissionsCache::getIdentifier() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 15

Strict Standards: Non-static method PermissionsCache::getObject() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 70

Strict Standards: Non-static method PermissionsCache::getIdentifier() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/permissions.php on line 45

Strict Standards: Non-static method Area::getOrCreate() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/block.php on line 59

Strict Standards: Non-static method Area::get() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/area.php on line 160

Strict Standards: Non-static method Cache::get() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/area.php on line 127

Strict Standards: Non-static method Cache::key() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/libraries/cache.php on line 117

Strict Standards: Non-static method Cache::get() should not be called statically in /home/richardharo/hsi-engineering.com/concrete/models/block.php on line 63

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This section addresses concerns regarding dusting or airborne particles that may become available during application of Quicklime, Portland cement, or fly ash, which are the chemical reagents used during…
Quicklime and Portland cement become unstable under normal environmental conditions and carbonate readily under the right conditions. Carbonation is produced by the reaction of….
Cation exchange and flocculation of clay particles in the presence of lime and /or cement are responsible for immediate improvements in soil plasticity, workability, uncured strength, and…
The process of Chemical Soil Stabilization echoes most cementious processes found in Construction applications. When a concrete pad is poured, it arrives by truck in…. 
No contractor shall be considered qualified without the minimum equipment requirement and a minimum demonstrated experience in chemical-soil stabilization. The specialty contractor shall…
 Proper curing ensures that sufficient moisture is retained in the layer so that the stabilizer can continue to hydrate and cure at a moderate rate. It reduces shrinkage, thus….
Is there a difference between Dolomitic and High Calcium Quicklime used for soil stabilization in California? The current edition of the California Standard Specification manual…
In the case of concrete, durability is defined as the ability of concrete to retain its strength, impermeability, dimensional stability and appearance over a prolonged period of...
The excavatability of a chemically treated soil or aggregate material is measured by its ability to be excavated with conventional excavation equipment, such as a bulldozer with…
A search of the scientific, health and safety literature on the effects of calcium oxide and calcium hydroxide has yielded the following information: Quicklime is not a hazardous substance under…
Chemically treating adjacent to or around existing and future landscape areas has been a question of concern.  It’s logical to think that a process, which relies on elevated pH to...
A properly hydrated, compacted, and cured chemically stabilized soil does not leach and will have minimal effects on Stormwater runoff due to ...
Pavement systems become inherently unstable when water is introduced to the system.  When water is introduced pavement systems change and these changing conditions create variable and…
A general statement cannot be made regarding the appropriate stabilizer or the amount thereof, as the degree of improvement is very dependent on the particular organic soil. The presence of organics increases…
Permeability, or hydraulic conductivity, symbolically represented as K, is a property of soil or rock that describes the ease with which water can move through pore spaces or fractures. It depends on the…
pH is one of the most frequent terms encountered in chemical soil stabilization because it’s a measure of acidity or alkalinity. pH, in simple terms, means the concentration of hydrogen ion* in water solution… 
The term soil stabilization is defined as a chemical or mechanical treatment designed to increase or maintain the stability of a mass of soil to improve its engineering properties…
Chemical soil stabilization using quicklime, cement, or fly ash involves many properties that are advantageous to flexible pavement subgrade and base courses.  It promotes strength, is economical...
Soils containing sulfates will, in combination with quicklime and/or cement form ettringite, a swelling mineral that utilizes large amounts of water to form its crystalline structure.  The formation…
In the case of concrete, durability is defined as the ability of concrete to retain its strength, impermeability, dimensional stability and appearance over a prolonged period of service under…

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