| 摘要: |
| 通过试验研究了相同流动度情况下，聚丙烯酸酯乳液（VIVID400）、乙烯/醋酸乙烯酯共聚乳液（CP149）和丁苯乳液（SD623）改性水泥砂浆含气量对其力学性能的影响.结果表明：3种聚合物乳液引入气泡量有所不同；随着消泡剂掺量的增加，改性水泥砂浆体积密度有不同程度的提高，含气量降低，而抗折、抗压强度则有较大幅度的提高；VIVID400改性水泥砂浆拉伸黏结强度随消泡剂掺量的增加呈先升高后降低的趋势，这可能与消泡剂对改性水泥砂浆孔结构的影响有关. |
| 关键词: 聚合物 体积密度 含气量 力学性能 |
| DOI：10.3969/j.issn.1007 9629.2013.04.001 |
| 分类号: |
| 基金项目:“十二五”国家科技支撑计划项目(2012BAJ20B02，2011BAE14B06)；国家自然科学基金资助项目（51178339）；2010年政策引导类计划新产品计划项目(2009GJC00012)；高性能土木工程材料国家重点实验室开放基金资助项目(2011 2012) |
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| Influence of Air Void Content of Polymer ModifiedCement Mortar on Mechanical Properties |
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SUN Zhen ping1, YE Dan mei1, FU Le feng2, ZHENG Bo cun2, FENG Zhong jun2, XIE Hui dong3
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1.Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University,Shanghai 201804, China;2.Shanghai Sunrise Chemical Co., Ltd., Shanghai 200232, China;3.Shandong Huasen Concrete Co., Ltd., Jinan 250101, China
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| Abstract: |
| Influence of air void content of polyacrylic ester latex(VIVID400), polyvinyl acetate ethylene latex(CP149) and styrene butadiene latex(SD623) modified cement mortar was investigated with fixed flow value. The research shows that bulk density of fresh mortar decreases due to air entrainment of polymer latex, but increases with increasing dosage of defoamer to varying degrees. The flexural strength and compressive strength of polymerized mortar increase with the increasing of dosage of deformer. The tensile bond strength of VIVID400 modified mortar increases at first, then decreases with the lower air void content, probably because of the influence of the defoamer on the micro pore structure of the mortar. |
| Key words: polymer bulk density air void content mechanical property |
