NaOH和聚合物乳液复合改性橡胶混凝土的性能研究  

Study on Performance of NaOH and Polymer Lotion Composite Modified Crumb Rubber Concrete

作　　者：苏有文[1] 杨钦淞 高梦秋 SU Youwen;YANG Qinsong;GAO Mengqiu(School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621000,China)

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621000

出　　处：《混凝土与水泥制品》2023年第6期94-97,共4页China Concrete and Cement Products

摘　　要：为了研究NaOH和聚合物乳液复合改性橡胶混凝土的性能,对橡胶颗粒采用浓度为4%的NaOH溶液进行12 h浸泡处理,然后将其等体积取代9.5%的河砂,并掺入不同种类(丁苯乳胶、合成树脂、乳化沥青)和掺量(1%、2%、3%、4%、5%)的聚合物乳液对橡胶混凝土(CRC)进行复合改性,研究了聚合物乳液的种类和掺量对CRC力学、抗冻性能的影响。结果表明:随着聚合物乳液掺量的增加,试件的抗压、抗折强度先增大后减小,其中,2%合成树脂对试件抗压、抗折强度的提高效果最好;对于CRC的抗冻性能,3种聚合物乳液的最佳掺量均为3%,其中,丁苯乳胶、合成树脂对CRC抗冻性能的改善效果相对较好,乳化沥青的改善效果相对较差。In order to study the performance of the NaOH and polymer lotion composite modified crumb rubber concrete,the rubber particles were soaked in NaOH solution with concentration of 4%for 12 hours,and then replaced river sand with equal volume(9.5%)of rubber particles,and the different types(styrene butadiene latex,synthetic resin,emulsified asphalt)and contents(1%,2%,3%,4%,5%)of polymer lotion were added to crumb rubber concrete(CRC).The effects of type and content of polymer lotion on the mechanical properties and frost resistance of CRC were studied.The results show that with the increase of polymer lotion content,the compressive strength and flexural strength of the specimen first increase and then decrease.Among them,2%synthetic resin has the best effect on improving the compressive strength and flexural strength.For the frost resistance of CRC,the optimal content of all three polymer lotions is 3%.Among them,styrene butadiene latex and synthetic resin have relatively good improvement effects on the frost resistance of CRC,while emulsified asphalt has relatively poor improvement effects.

关 键 词：橡胶混凝土 橡胶颗粒 聚合物乳液改性 复合改性 力学性能 抗冻性能 

分 类 号：TU528.041[建筑科学—建筑技术科学]