无机填料对水泥固化泥炭土强度的影响

Effect of Inorganic Filler on Strength of Cement-Stabilized Peat

通过无侧限抗压强度和扫描电镜试验,研究了无机填料种类和粒径对水泥固化泥炭土强度的影响.结果表明:水泥固化泥炭土强度随着石英砂掺量的增加呈先增加后降低的趋势,20%石英砂掺量下水泥固化泥炭土强度最高;当石英砂粒径d>1.0 mm时,水泥固化泥炭土强度提升有限,而当d<0.5 mm时,水泥固化泥炭土强度提升明显;高岭土颗粒可有效填充泥炭土孔隙,有利于水泥联结无机填料和泥炭土颗粒,且水泥联合高岭土固化泥炭土的强度明显优于水泥联合石英砂;当泥炭土含水率为600%,高岭土掺量从5%增至30%时,28d龄期水泥固化泥炭土强度的增幅为58.5%~116.6%.

Through unconfined compressive strength and scanning electron microscope tests,the effects of inorganic filler type and particle size on the strength of cement-stabilized peat were investigated.The results indicate that the strength of cement-stabilized peat initially increases and then decreases with the addition of quartz sand,reaching its peak at a 20%sand content.When the particle size of quartz sand is greater than 1.0 mm,the increase in cement-stabilized peat strength is limited,whereas it is significantly enhanced when the sand particle size is less than 0.5 mm.Kaolin particles effectively fill the voids in peat,facilitating the bonding of cement with inorganic filler and peat particles.The strength of cement-stabilized peat combined with kaolin is notably higher than that with sand.When the moisture content of peat is 600%,with an increase in kaolin content from 5%to 30%,the strength of the cement-stabilized peat at 28 days of curing period shows an increase ranging from 58.5%to 116.6%.