摘要
气泡混合轻质土是解决公路路基病害的一种新兴技术。通过水泥、碱激发火山灰胶凝材料,以及高岭土的配比试验,制备出三种强度高、耐盐蚀的固化剂;然后以三种固化剂和南疆当地风积沙为掺料,通过不同的配合比试验,研究一种既满足强度要求,又符合经济性原则的耐盐蚀的气泡混合轻质风积沙土。经试验研究和对比发现:当水泥、碱激发火山灰胶凝材料按6∶4的比例制备为固化剂时,抗压强度能够提高18.2%;同时,抗氯离子和硫酸根离子的能力得到改善。固化剂掺量为260 kg时,X_2与风积沙制备的气泡混合轻质风积沙土抗压强度可达2.96 MPa;X_3与风积沙的抗压强度为2.88 MPa,XG_1与风积沙的抗压强度为2.67 MPa;从强度和微观分析得出自制固化剂X_2与风积沙的结合效果较好,为风积沙的资源化利用提供了新的途径。
Foamed cement banking is a new technology to solve roadbed disease. Three kinds of curing agents with high strength and corrosion resistance were prepared by the cement,alkali ash gelled material and ratio of kaolin test. Then three kinds of curing agent,local aeolian sand were used as the admixture to test,research on a kind of foamed cement banking which can meet the requirement of strength and meet the principle of economy. The results show that the compressive strength can be increased by 18. 2% when the cement and alkali-activated volcanic ash cementitious material is prepared as the curing agent in the ratio of 6∶ 4,and the ability of resisting chloride ion and sulfate ion is improved. When curing agent content is 260 kg,the compressive strength of foamed cement banking mixed with curing agent X_2 and aeolian sand is 2. 96 MPa,the compressive strength of X_3 and aeolian sand is2. 88 MPa,and the strength of XG_1 and aeolian sand is 2. 67 MPa; From the strength and micro analysis it is concluded that the combination of self-made curing agent X_2 and aeolian sand effect is good,for the recycling use of aeolian sand provides a new way.
出处
《科学技术与工程》
北大核心
2017年第26期114-119,共6页
Science Technology and Engineering
