工业废渣固化剂加固滨海软土固化试验研究

Experimental Study on Solidification of Coastal Soft Soilby Industrial Waste Solidification Agent

利用矿渣、脱硫石膏、铝渣、水泥、粉煤灰、氢氧化钠制成的固化剂固化滨海软土,既可以充分利用工厂废弃物也可以减少水泥用量,大范围加固曹妃甸软土。研究了固化剂不同成分比例、不同含水率、不同固化剂掺入比等变量情况下固化土的无侧限抗压强度。研究表明,固化剂中胶凝材料的直接水化反应和工业矿渣在碱环境中的二次水化反应有效提高了滨海软土的无侧限抗压强度;当水泥40%,矿渣24%,脱硫石膏11%,铝渣2%,粉煤灰20%,氢氧化钠3%且固化剂掺入比为12%时,固化土的力学性能显著提高。采用该工业固化剂对滨海软土进行加固处理,不仅可降低地基处理成本,而且可消耗大量工业废渣,经济及环境效益显著。

Solidification agents made from slag,desulfurization gypsum,aluminum slag,cement,fly ash,and sodium hydroxide can be used to solidify Caofeidian soft soil,which can fully utilize factory waste and reduce the amount of cement used to reinforce coastal soft soil on a large scale.The unconfined compressive strength of solidified soil was studied under variables such as different component ratios,moisture content,and addition ratios of solidified agents.Research has shown that the direct hydration reaction of the cementitious material in the curing agent and the secondary hydration reaction of industrial slag in an alkaline environment effectively improve the unconfined compressive strength of coastal soft soil;When the cement content is 40%,slag content is 24%,desulfurization gypsum content is 11%,aluminum slag content is 2%,fly ash content is 20%,sodium hydroxide content is 3%,and the curing agent dosage is 12%,the mechanical properties of the solidified soil are significantly improved.The use of this industrial solidification agent for strengthening coastal soft soil not only reduces the cost of foundation treatment,but also consumes a large amount of industrial waste,resulting in significant economic and environmental benefits.