What is BioCement?

BioCement™ stimulates native soil bacteria to cement soil particles together through a process known as Microbial Induced Calcite Precipitation (MICP). BioCement™ product is shipped as a dry powder to be mixed in water. The resulting nutrient rich solution is then fed to native soil bacteria, which grow in proportion to the amount of nutrients, cementing the soil together. Cemented soil particles form a hardened, less permeable material similar to limestone, which is used for soil cementation and remediation.

BioCement is a two-step process

Phase I: Enrichment

Nutrients in the form of sugar, protein, and nitrogen are applied to the soil to grow the native bacteria population. The bacteria ingest the nutrients and hydrolyze the urea component in the presence of water to form ammonium and carbonate ions.

Phase II: Treatment

Nutrients are again applied to the soil, with the addition of calcium chloride. In the presence of calcium ions and nucleation sites (soil particles), the carbonate ions react spontaneously with the calcium ions to form calcium carbonate, the cementing agent used to bind soil particles together.

How to use it

Once BioCement powder is mixed into a liquid form it can be applied through a variety of means including spray bars, hoses, injection and extraction wells, drip lines, and high-powered pumps.


BIOCEMENT HIGHLIGHTS

b-arrow  BioCement increases the shear strength and unconfined compressive strength of a wide range of soils—from large grained sands to fine grained silts.

b-arrow  BioCement fills in the empty space between soil particles, which means the volume of the treated soil does not increase. Because of that, BioCement can be used around existing infrastructure without causing damage.

b-arrow  BioCemented soils are self-healing—if the bonds between soil particles are broken, the bacteria in the soil will repair them.

b-arrow  BioCement is a carbon sequestering process: it’s not just environmentally neutral, it actually helps to store carbon that could otherwise enter the atmosphere

b-arrow  The bacteria used in creating BioCement are naturally occurring in almost all soils and limestone (or calcite) makes up a third of the Earth’s crust. In other words, this process is a very natural part of the environment.

b-arrow  Depending on the application, BioCement can be customized to provide a range of soil strength and permeability.

GEOTECHNICAL APPLICATIONS

Slope Erosion
Slope Erosion
Erosion Control

Slope Erosion

In areas where soil erosion on slopes is problematic, BioCement™ can be used to increase the soil integrity, decreasing the likelihood of soil movement. Also, because BioCement™ is not water soluble,…

Bridge Piers
Bridge Piers
Erosion Control

Bridge Piers

Bridge piers present a problem for hydraulic and bridge engineers: the soil surrounding the pier erodes causing pier failure. BioCement™ can be used to prevent this erosive process.

Groundwater Flow
Groundwater Flow
Erosion Control

Groundwater Flow

BioCement™ decreases the hydraulic conductivity of soils. This is useful in protecting foundations from seepage, reducing groundwater flow near excavation and drilling sites, and controlling water flow around contaminants in soils.

Road Subgrades
Road Subgrades
Subsurface Treatments

Road Subgrades

A strong subgrade is necessary for long road pavement life. BioCement™ is an environmentally responsible alternative to current methods as it provides soil stabilization using a natural process without losing strength…