Sand Filling in Footing Backfilling in Foundation Know Available Benefits of sand filling in footing. In Foundation soil there are many various types of clay, slit content available. Mostly to filling river sand is utilized to maintain consistency for foundation bed. foundation soil has more clay and silt content with water, river sand is used to provide uniformity for the foundation bed. Using Quality soil during building construction to strengthen and support a structure’s foundation.
Sand Filling Plinth Level Backfilling
Choose the right backfill material, compacting the backfill options. the footing is arranged directly on the rock bed since even a small vibration on the earth can result in collapsing the structure. The purpose of applying sand is to reduce the risk. To Minimize resistance soil using under footing bed. Based upon the type of material used for backfilling in the foundation various many types of backfilling soil available on market.
Prestressing the reinforcement in the foundation bed results in significant improvement of bearing capacity of weak soil. course grained soil, fine graded soils of low plasticity, Coarse grained soil include gravels and sandy with water, range from clayey sand through the well-graded gravels of sand mixtures with little or no fines. For instance, a concrete foundation must support the loads associated with columns or bearing walls without shifting or settling more than can be tolerated by the building’s frame. soil properties play a crucial role. to improve support capability. Soil can be removed and replaced with suitable materials, aggregates can be mixed with the soil to improve strength and compressibility, or layers of more suitable materials.
Sand Filling Foundation upto Plinth Beam Area
PCC is mainly used in footings, grade slabs, and concrete roads. The purpose of using it in footings is to provide firm, rigid, non-porous, impervious and leveled base for RCC footings. Know more Benefits of PCC bed. If PCC bed is applied, it provides good consistency to the foundation bed and resists termite entry to the structure works. If the footing is arranged directly over the unsettled sand, it may fall down because of bad weather conditions. Soil becomes extended or more unsteady throughout rain times and under this situation the structure may fall down completely. by this pcc used to provie a rigid impervious bed to RCC in the foundation where the earth is soft and yielding.
Properties of Plain Cement Concrete
Compressive strength: 200 to 500 kilogram/square centimeter
Tensile strength: 50 to 100 kilogram/square centimeter
Density: 2200 to 2500 kilogram/cubic meter
Curing of PCC:
After 24 hours of laying PCC, moist the concrete surface by flooding with water or by covering with moist gunny bags at least for seven days.
Soil Compacting Foundation for large areas mostly Roller is best option. Rolling is one of most efficient compacting methods. For small size fill areas, hand held compactors can be used in smaller areas. For granualr soil, Vibrating plate compactors work best. Rammers or impact type machines are used for cohesive soils. Compacting the soil during construction costs much less than correcting settlement problems after they occur. Compact disturbed soil beneath footings, slabs, basement floors, patios, garage floors also.
Take maximum precautions while compacting. Soil compaction increases the density of the soil, making it less prone to moisture and settling. If failed in soil settling, its main cause of cracks in concrete slab. Compact the soil with a mechanical compactor for large areas or a hand tamp for small ones. Plinth filling is done to fill the area within the Plinth. The excavated material from the Plinth or the material procedure from the outside is used for this. Backfilling shall be carried out in layer and each layer shall be thoroughly compacted.
also Read: What Is The Best Way For Concrete Curing
Design of Foundation On Sand Fill
Foundations can be designed on the basis of bearing capacity and settlement calculations. The Easy settlement and bearing capacity of underlying foundation soils also should be evaluated. Practically all types of construction can be founded on compacted fills, provided the structure is designed to tolerate anticipated settlements and the fill is properly placed and compacted. Good and continuous field inspection is important.