The impact of porosity, curing time, amounts of zeolite and cement on the tensile strength of sand-zeolite-cement blends

The current study intends to quantify the influence of porosity, curing time, cement and zeolite content, and SiO۲ and Al۲O۳ particles as active composition (AC) and porosity/ AC ratio on zeolite-cemented sands measuring splitting tensile strength (qt). In this research, ۲۱۶ splitting tensile tests considering different porosities (η), curing times (t), zeolite (Z) and cement(C) contents were performed. The results indicated that the optimum amount of zeolite replacement by cement was ۳۰%, and the strength improvement rate of zeolite-cemented sand (Z=۳۰%) compared to the mere cemented sand (Z=۰%) increased with the increase in the cement content as well as the porosity of the compacted mixture. Based on the results of the sand-zeolite-cement mixtures, it has been shown that the qt improved by increasing the C. Also, a power function adapts well to fit both C and η. The AC parameter (SiO۲+Al۲O۳ particles), which is the active composition that participate in the chemical reaction, was introduced, and the qt-AC diagrams were drawn. Afterward, the qtwere plotted against the porosity η/AC, which is regarded as a controlling and key parameter ofthe qt. As it was anticipated, the more curing time considered the higher value of zeolite cementedsands qt achieved. It was also revealed that η/AC is a good key parameter in the evaluation of qt.Finally, the experimental results and the parameter of 𝜂 η−۱.۷۱۳ AC۱.۴۲۷t۰.۷ introduce an acceptabledescription of the mechanical strength

کلیدواژه ها:

Stabilization ، Tensile strength ، Active composition ، Curing time ، Zeolite ، Cement ، Sand.