期刊论文

COMPARATIVE EXPERIMENTAL ON SOLIDIFICATION OF NANSHA ORGANIC SOFT SOIL WITH CEMENT AND DIFFERENT ADMIXTURES

中文

工业建筑

1000-8993

2019

49

2

93-97

10.13204/j.gyjz201902018

本校为其他机构

以含5%腐殖酸的南沙重塑软土为研究对象,在水泥掺量为15%的基础上,分别添加石膏、矿渣、氢氧化钠、硫酸钠和萘系高效减水剂五种外掺剂,通过无侧限抗压强度试验和扫描电镜（SEM）分别研究不同外掺剂作用下固化软土强度特性及微观结构特征。试验结果表明:在水泥掺量为15%的基础上,固化效果最好的是外掺5%的石膏,其28 d强度达到0. 8 MPa,相比单掺水泥提高了2. 58倍,随后依次分别是外掺3%硫酸钠、0. 8%氢氧化钠、6%矿渣、1. 5%减水剂。SEM试验结果显示:在水泥基中掺入外掺剂后,南沙水泥土的孔隙度减小,其中外掺石膏孔隙最少,胶结最均匀。不同外掺剂固化后的南沙有机质软土28 d强度均高于0. 4 MPa。

Guangzhou Nansha remolded organic soft soil containing 5% humic acid was solidified with the mixture of 15% cement and another admixture,including gypsum,slag,sodium hydroxide,sodium sulfate,and naphthalene high efficiency water reducing agent.The strength and microstructure characteristics of cement-soil with different admixtures were studied by unconfined compressive strength test and SEM.The results showed that the curing efficiency of the soft soil cured with 5% gypsum and 15% cement was the best,followed was with 3% sodium sulfate,0.8% sodium hydroxide,6% slag and 1.5% water reducer.The u...