气泡轻质土应力-应变特性及耐久性研究.pdfVIP

国-.IDESIGN AND T因T 文.编号: 1000-033X(2016) 11-0042-04 气泡轻质土应力一应变特性及耐久性研究 赵运会，刘华强，樊晓一，张玲玲，杨 琪 (西南科技大学土木工程与建筑学院，四川绵阳 621010) 摘 要:针对气泡含量对气泡轻质土抗剪强度及冻融循环对其抗压强度和吸水牟的影响问题，通过 三轮试验和抗压强度试验，对气泡轻质土的力学特性进行了研究，得出以下结论:随着气泡含量的 减小，气泡轻质土的破坏峰值逐渐增大;当混合料比例一定时，冻融循环对气泡轻质土吸水率的影 响较弱 ，气泡含量对吸水牟影响较小;气泡轻质土粘聚力随着气泡含量的增加而减小，内摩擦角则 呈现先增大后减小的趋势。 关键词:气泡轻质土;气泡含量; 抗剪强度; 抗压强度 中图分类号: U416.21 文献标志码:B Stress-Strain Features and Durability of Foamed Cement Banking ZHAO Yun-hui. LIU Hua-qiang. FAN Xiao-yi. ZH ANG Ling-ling . YANG Qi (School of Civil Engineering and Architecture , Southwest University of Science and Technology , Mianyang 621010 , Sichuan , China) Abstract : In order to study the influence of foam content onshear strength. compressive strength and water absorption of foamed cement banking. the mechanical properties o f foamed cement banking were studied. The following conclusion s w ere drawn based on a large number of triaxial t ests and compressive strength tests : the peak of destru ction to foamed cement banking mounts when the foam content drops; when the proportion of mixture is fixed. the effect of freez.e-thaw cycles and foam content on the water absorption is weak; with the increase of foam content . the cohesion dimini shes. while the inner friction increases at first and then decreases. Key words: foamed cement banking; foam content; shear strength ; compressive strength 轻质土的力学性能和变形机理，以及揭示气泡轻 。引 质土的不均匀变形和分析气泡轻质土破坏原因， 气泡轻质土是一种新材料，是按照一定比例在 具有重要意义。 原料土中添加固化剂、水和气泡，经过充分混合、搅 1 试验准备 拌后形成的新型填土。由于该材料的轻质性、强度 可调节性、高流动性以及固化后的自立性，使其具有 1. 1 试验材料 施工性、耐久性好和隔热隔音等优点，在工程实践中