新型固化剂对湿陷性黄土固化效果研究  

RESEARCH ON THE SOLIDIFICATION EFFECT OF NEW CURING AGENTS ON COLLAPSIBLE LOESS

作　　者：李文刚 李乐天 邓尊赏 王浩亮 李文斌 孔院宏 LI Wen-gang;LI Le-tian;DENG Zun-shang;WANG Hao-liang;LI Wen-bin;KONG Yuan-hong(Ningxia Luguangtong Highway Engineering Test Co.,Ltd,750000,Yinchuan,China;Ningxia Mingyuan Environmental Protection Technology Co,Ltd,750000,Yinchuan,China;Ningxia Zhengtai Construction Engineering Co..Ltd,750000,Yinchuan,China)

机构地区：[1]宁夏路广通公路工程试验检测有限公司,银川750000 [2]宁夏铭远环保科技有限公司,银川750000 [3]宁夏正太建设工程有限公司,银川750000

出　　处：《建筑技术》2024年第3期349-353,共5页Architecture Technology

摘　　要：通过在试件土中加入不同掺量自研的固化剂,成型无侧限抗压试件,分别对改良固化土的无侧限抗压强度试验、水稳定性试验和冻融强度试验,分析该固化剂加固湿陷性黄土的强度变化规律。研究结果表明:随着湿陷性黄土中固化剂掺量的增加,最大干密度降低,最佳含水率和密实度均出现上升,固化土更为密实的不掺固化剂的黄土抗压强度增长随养护龄期的增加有限,而改良后的黄土强度随固化剂掺量和养护龄期的增加而增加;不同掺量的固化土在浸水1 d后,强度均出现了较大的损失,当固化剂掺量超过4%后,抗水损能力较好;在不同工况下的冻融循环试验中,不浸水固化土的强度表现出了与无侧限抗压试验中类似的规律,而浸水工况下固化土的性能出现了较大的劣化,需要进一步加强抗冻融能力。By adding self-developed curing agents with different dosages to the sample soil,unconfined compressive specimens were formed.The strength changes of the improved solidified soil were analyzed through unconfined compressive strength tests,water stability tests,and freeze-thaw strength tests.The research results show that with the increase of the dosage of solidifying agent in collapsible loess,the maximum dry density decreases,the optimal moisture content and compactness both increase.The compressive strength of loess without solidifying agent,which is more compact,increases limited with the increase of curing age.However,the strength of improved loess increases with the increase of solidifying agent dosage and curing age.After being immersed in water for one day,the strength of solidified soil with different dosages showed significant loss.When the dosage of solidifying agent exceeded 4%,the water resistance ability was better;In the freeze-thaw cycle tests under different working conditions,the strength of non immersed solidified soil showed a similar pattern to that in unconfined compression tests.However,the performance of solidified soil under immersion conditions showed significant degradation,and further strengthening of its freeze-thaw resistance is needed.

关 键 词：湿陷性黄土 新型固化剂 抗压强度 水稳定性 

分 类 号：TU446[建筑科学—岩土工程]