Models for Strength Prediction of High-Porosity Cast-In-Situ Foamed Concrete

Table 1

Review of compressive strength prediction models for foamed concrete.

Author	Material composition	Models
Balshin [8]	Cement
Neville [9]	Cement, sand, fly ash
Tam et al. [10]	Cement
Durack and Weiqing [11]	Cement, sand, fly ash
Nambiar and Ramamurthy [12]
Hoff [13]	Cement
Kearsley and Wainwright [14]	Cement, sand, fly ash

 = the uniaxial compressive strength of foamed concrete;  = porosity;  = gel-space ratio;  = the air/cement ratio;  = casting density;  = the specific gravity of cement;  = unit weight of water;  = water-solid ratio by weight;  = uniaxial compressive strength of concrete at a porosity of 0;  = filler-cement ratio by weight;  = admixture-cement ratio by volume;  = gel strength;  = hydration water-cement ratio by weight;  = volume of cement;  = filler volume of unit volume;  = fresh density;  = empirical constant.