摘要
矿渣、钢渣、粉煤灰等工业固废替代水泥已普遍应用于塑性混凝土,将三者按一定比例混合,配制GS固化剂。为研究GS固化剂塑性混凝土的基本性能,进行配比设计,并基于无侧限抗压强度与柔性壁渗透,开展试验。结果表明:膨润土含量增加,无侧限抗压强度和渗透系数有所降低,但降幅不明显;GS含量和龄期增加,无侧限抗压强度有所提高,在14 d时,增幅较大,在28 d和60 d时,随膨润土含量增加,增幅减小;渗透系数随GS含量增加而减小,当GS含量增加到235 kg/m^(3),渗透系数有较大改善,由10-7cm/s数量级减小到10-8cm/s数量级,并且在13~18 d间存在拐点,此前渗透系数降低较快,之后趋于平缓,当GS含量小于235 kg/m^(3)时,渗透系数降低缓慢,并未出现拐点。
It is common to use industrial solid wastes such as slag,steel slag and fly ash instead of cement in plastic concrete.The three are mixed in a certain proportion to prepare GS curing agent.To study the basic properties of GS curing agent plastic concrete,a mix design is carried out,and experiments were conducted based on unconfined compressive strength test and flexible wall permeability test.The results show that as the content of bentonite increased,the unconfined compressive strength and permeability coefficient decrease,but the decrease is not significant;The unconfined compressive strength increased with the increase of GS content and age.At the age of 14 d,the increase was significant,and at the age of 28 d and 60 d,the increase decreased with the increase of bentonite content;The permeability coefficient decreases with the increase of GS content.When GS content increases to 235 kg/m^(3),there is a significant improvement in the permeability coefficient,which decreases from the order of magnitude of 10-7 cm/s to order of magnitude of 10-8 cm/s.There is also a turning point between 13 d and 18 d.where the permeability coefficient decreases rapidly before gradually flattening.When GS content is less than 235 kg/m3,the permeability coefficient decreases slowly and no turning point appears.
作者
焦龙进
胡梦狄
葛鹏
孙振海
JIAO Longjin;HU Mengdi;GE Peng;SUN Zhenhai(The No.3 Brigade of Jiangsu Geological Bureau,Zhenjiang,Jiangsu Province,212021 China;Jiangsu University of Science and Technology,Zhenjiang,Jiangsu Province,212028 China;Jiangsu Geological Foundation Pile Engineering Company,Zhenjiang,Jiangsu Province,212021 China;Jiaxing Hangjiahu South Drainage Engineering Salt Official Hub Management Office,Jiaxing,Zhejiang Province,314300 China)
出处
《科技资讯》
2025年第9期113-117,共5页
Science & Technology Information
基金
2022年江苏省地质局科研项目“污染场地深层搅拌灌浆垂直屏障可持续防控关键技术研究”(项目编号:2022KY06)。
关键词
塑性混凝土
GS固化材料
无侧限抗压强度
渗透系数
Plastic concrete
GS curing material
Unconfined compressive strength
Permeability coefficient
