Subgrade and Subbase for Concrete Slabs

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Subgrade and Subbase for Concrete Slabs


Subgrade and Subbase are the foundation of a concrete slab and play critical role in its performance. 

Subgrade for Concrete Slab

This is essential for concrete slab because this concrete slab load and imposed loads are supported by subgrade. When required, this concrete slab can be placed on the top of natural soil. Concrete slab can be made by using Sanghi Cement, Sanghi OPC 53 Grade cement, Sanghi PPC cement, Sanghi Ready mix concrete. Sanghi is the major cement suppliers in Gujarat also the ready mix concrete manufacturer. Concrete slab does not need any extra layers as it is clean and compacted.

If soil is wet due to rain or any other reason than it cannot be compacted and suitable grade cannot be obtained.

The organic soil is the least desirable because it cannot be consolidated and hence shall be removed from the site.

All type of soils need improvement and this can be done by compaction and stabilization. Stabilization can be done by Ordinary Portland Cement 53, calcium chloride, or lime blended into the soil then it is compacted.

Subbase for Concrete Slab

This is the layer of gravel and placed on the top of subgrade. It is cheap material. This is optional and will provide work platform and uniform support for the slab. Load carrying capacity of slab increase as thickness of subbase increases. Subbase interrupts capillary and prevent water to move upward from groundwater into the slab.

For subgrade natural soil is brought to the construction site. For subbase granular material is used.

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Blog written by

Shruti Doshi
Technical Officer – Sanghi Cement & Blogger
shruti.doshi@sanghicement.com
shrutidoshi.1492@gmail.com

Blog Managed by

Nirav Pandya
Digital Marketing Officer – Sanghi Cement
nirav.pandya@sanghicement.com


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