Soil cement is a construction material. It is a mix of pulverized natural soil with small amounts of Portland cement and water. Soil cement is processed in the same manner as Roller Compacted Concrete (RCC) or Cement-Treated Base (CTB) using a twin-shaft continuous mixing plant and later compacted to form a high density base. The dense, hard and semi-rigid durable material is formed by hydration of the cement particles. The engineered mix is a stronger, permanent sub-grade for enhanced pavement support and capacity and will provide the following benefits:
Improved characteristics for marginal on-site soils
Reduced plasticity and improved strength
Less susceptible to damaging effect of water
Can create an all-weather work platform
Use of on-site soil rather than removal and replacement with expensive select fill material
Permanent soil modification (does not leach)
No mellowing period required
Soil cement is frequently used as a construction material for pipe bedding, slope protection, and road construction to reinforce and protect the sub-grade. It has good compressive and shear strength, but is brittle and has low tensile strength, so it is prone to forming cracks.
Soil cement mixtures differ from Portland cement concrete in the amount of paste (cement-water mixture). Where in Portland cement concrete the paste coats all aggregate particles and binds them together; soil cement uses a reduced amount of cement and voids are left in the material which results in a cement matrix with nodules of un-cemented material.
Four variables control the properties and characteristics of Soil cement:
(1) the nature of the soil material-whether it's clay, silt, sand, coarse aggregate, or a combination;
(2) the proportion of cement in the mix;
(3) moisture conditions, such as the moisture content of mix at the time of compaction and curing conditions (moisture, temperature and time); and
(4) the degree of compaction.
Silt and clay soils, particularly when they are wet, can lead to construction problems. These soils can often be soft, plastic, and difficult to compact. Using our high-intensity, high-output, twin-shaft continuous mixing plant, Soil cement can be mixed and used to improve the properties and construction characteristics of silt and clay soils by reducing this plasticity and enhancing the compaction and strength of the treated soil.
Which Rapidmix plant is right for your Soil Cement mixing needs?
Continuous Mixing:When the output of the mixer is equivalent to the input of materials and the mixer can be operated without interruption to charge and discharge of material.
Rapid offers 2 types of continuous mixing plants:
Volumetric Measurement:When the materials of concrete are flowing continuously and measured by volume, by using a calibrated rotary opening, a calibrated fixed-gate opening, or a combination of these, so a predetermined volume of each ingredient is obtainined in a designated time interval, the method of measurement is volumetric. Continuous Volumetric measurement with multiple ingredients requires the proper relationship among those ingredients be maintained. It is this calibration of speed and volume which provides a smooth and continuous release of materials resulting in your most homogenous mix. See our Volumetric Rapidmix models: 400C or 600C plants.
Continuous Weigh: Materials are continously weighed from the aggregate hopper via load cells which weighs the material from the loading to the mixing chamber. On route, the material from the Silo is collected in weigh hoppers where material is then dispensed into the mixing chamber for an acurrately weighed and mixed final product. Feel free to visit our Continuous Weigh Rapidmix models: 400CW or 600CW
The answer is both types will mix your materials, this determination is sometimes specified in the source of work or by an engineer.