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首页> 外文会议>ISCC 2010;International symposium on cement concrete;International conference on advance in concrete technology sustainable development >Research on Strength Influence and Mechanism of Redispersible Polymer Powder and Superplasticizer on the Crumb Rubber Mortar
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Research on Strength Influence and Mechanism of Redispersible Polymer Powder and Superplasticizer on the Crumb Rubber Mortar

机译：可再分散乳胶粉和高效减水剂对胶粉砂浆强度的影响及其机理研究

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摘要

Crumb aggregate concrete has lots of excellent characteristics and is a new research hot spot in the field of concrete material. It has rather wide application future. While the chief shortcoming of crumb aggregate concrete is its relative low strength. One of the reasons is the weak bonding between crumb and matrix. Therefore improving the binding between crumb and matrix has important significance for increase strength of crumb aggregate concrete. To improve the interface binding between crumb and matrix, in the laboratory the redispersible polymer powder(RPP) and RPP +superplasticizer(ASPC) were mixed with Crumb Rubber Mortar (CRM). The influence of RPP, RPP +ASPC and crumb size on the strength of CRM were studied respectively. And the function mechanism of RPP and RPP +ASPC on increase interface binding and CRM strength was also explored. The results indicate that:(l) addition both of RPP and RPP +ASPC could improve the strength of CRM, and the improvement effectiveness of adding RPP+ASPC was better than adding RPP; (2) RPP could wrap the crumb particle and the continuous membrane was formed on the crumb particle; the dispersion of cement and crumb particle increased due to the addition of ASPC, and then compound membrane was formed by ASPC and RPP, which improve the interface binding between crumb and matrix and the strength of CRM; (3) the strength of CRM could be also improved when crumb size was modest.
机译：碎石骨料混凝土具有许多优良的特性，是混凝土材料领域的新研究热点。它具有相当广阔的应用前景。碎石骨料混凝土的主要缺点是其相对较低的强度。原因之一是面包屑和基质之间的结合力弱。因此，提高碎石与基体之间的结合力对提高碎石骨料混凝土的强度具有重要意义。为了改善面包屑与基质之间的界面结合力，在实验室中将可再分散乳胶粉（RPP）和RPP +高效减水剂（ASPC）与面包屑橡胶砂浆（CRM）混合。分别研究了RPP，RPP + ASPC和面包屑大小对CRM强度的影响。并探索了RPP和RPP + ASPC对增加界面绑定和CRM强度的作用机理。结果表明：（1）同时添加RPP和RPP + ASPC均可提高CRM的强度，且添加RPP + ASPC的改善效果优于添加RPP。 （2）RPP可包裹碎屑颗粒，并在碎屑颗粒上形成连续的膜；水泥和碎屑的分散由于ASPC的加入而增加，然后ASPC和RPP形成复合膜，改善了碎屑与基体之间的界面结合力，提高了CRM的强度。 （3）当面包屑大小适中时，CRM的强度也可以提高。

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