An Experimental Study on Foam Concrete By Partial Replacement of Cement using Rice Husk Ash and Silica Fumes

A type of lightweight aerated concrete called foam concrete lacks coarse particles, making it comparable to aerated mortar. Foam concrete is created when slurry and pre-formed foam are combined. The foam’s job is to create air pockets in the slurry made of cement. The foam is made separately with a foam generator by diluting the foaming ingredient with water and aerating it. The slurry forms a shell surrounding the bubbles of foam, and as the foam begins to break down, the paste’s strength keeps it in place around the air holes. The ratio of water to cement (w/c) typically varies from 0.4 to 1.25. As the quantity decreases, the foam concrete mixture becomes excessively rigid, which breaks the bubbles, However, when the combination’s water content increases, it becomes too thin to support the bubbles, which causes the bubbles to separate from the mixture. You can make foam concrete with any dry density between 300 and 1850 kg/m3. In this experiment, there are two foam concrete mixtures created using silica fumes and rice husk ash, and efforts have been produced to choose the foam concrete mix’s proportions. A collection of 36 cube specimens is created and subjected to mixture testing. Following this, their actual state (density) and particular structural (compressive strength) qualities are examined, with the findings being reported. Important terms: Foam Concrete, Foaming Agent, Rice Husk Ash, Silica Fumes, Density.