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新型混凝土提浆剂研究
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作者 蒋天福 《中国科技投资》 2022年第14期113-115,共3页
异戊烯聚氧乙烯醚(TPEG)、丙烯酸羟乙酯、丙烯酰胺、引发剂通过自由基共聚反应能够聚合成新型混凝土提浆剂.研究表明,新型混凝土提浆剂质量比分别为:聚醚25%、AMPS0.25%,过硫酸铵0.5%;丙烯酸羟乙酯5.5%、丙烯酰胺15%,反应温度为50℃.与... 异戊烯聚氧乙烯醚(TPEG)、丙烯酸羟乙酯、丙烯酰胺、引发剂通过自由基共聚反应能够聚合成新型混凝土提浆剂.研究表明,新型混凝土提浆剂质量比分别为:聚醚25%、AMPS0.25%,过硫酸铵0.5%;丙烯酸羟乙酯5.5%、丙烯酰胺15%,反应温度为50℃.与市场上同类产品相比,新型混凝土提浆剂在配合比较差的混凝土中,特别是在胶凝材料较少的情况下,在混凝土拌合物中起到明显的提浆作用,能够提高混凝土拌合物的和易性,增加混凝土拌合物的黏聚性. 展开更多
关键词 丙烯酰胺 和易性 粘聚性 提浆剂
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Evaluation of reclaimed asphalt pavement binder stiffness without extraction and recovery 被引量:1
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作者 马涛 黄晓明 U.B.Hussain 《Journal of Central South University》 SCIE EI CAS 2011年第4期1316-1320,共5页
A new testing procedure to estimate the low-temperature stiffness of the reclaimed asphalt pavement (RAP) binder was developed. In the testing procedure, the SuperpaveTM Bending Beam Rheometer (BBR) with special m... A new testing procedure to estimate the low-temperature stiffness of the reclaimed asphalt pavement (RAP) binder was developed. In the testing procedure, the SuperpaveTM Bending Beam Rheometer (BBR) with special modifications and binder blending charts by Asphalt Institute were utilized. Modifications involved the development of a new kind of sample mold and different testing parameters were made to BBR testing procedure to capture the theological properties of bitumen mortars produced by mixing fresh binder with fine RAP materials or RAP aggregate. The stiffness relationship between binder and bitumen mortar was established based on the BBR test results. The blended binder stiffness in bitumen RAP mortar was estimated from the RAP mortar stiffness based on the binder-mortar relationship. And finally, the RAP binder stiffness was estimated from the blended binder and fresh binder stiffness based on the blending charts by Asphalt Institute. The results indicate that the new procedure can capture the rheological properties of bitumen mortar and can be used to estimate the low temperature stiffness of RAP binder without binder extraction and/or any chemical treatments. 展开更多
关键词 aged binder reclaimed asphalt pavement MORTAR STIFFNESS Bending Beam Rheometer blending chart
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