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首页> 外文会议>第二届自密实混凝土设计、性能及应用技术国际研讨会(2nd International Symposium on Design,Performance and Use of Self-Consolidating Concrete SCC'2009-China) >THE EFFECTS OF EXPANDER ADMIXTURE ON STRENGTH AND SHRINKAGE CRACKING PROPERTIES OF SELF COMPACTING CONCRETE BY USING ARTIFICIAL SAND
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THE EFFECTS OF EXPANDER ADMIXTURE ON STRENGTH AND SHRINKAGE CRACKING PROPERTIES OF SELF COMPACTING CONCRETE BY USING ARTIFICIAL SAND

机译：膨胀剂对人工砂自密实混凝土强度和收缩开裂性能的影响

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摘要

This paper presents a study on using expander admixture in Self-Compacting Concrete (SCC) and its effects on the strength and shrinkage cracking properties of concrete mixes. The application of expander admixture has already brought a great improvement for strength and shrinkage cracking properties of SCC. Furthermore, the expander admixture has promoted an interesting possibility for using secondary raw materials in the construction industry. An experiment that was conducted on an artificial sand and high range water reduce admixture "PCA-II" was produced by Jiangsu Subote Materials Co.,Ltd, Jiangsu Nanjing, China. The results indicated that the existence of expander admixture in artificial sand, aggregate grading,specimen dimension, etc. Has significant effects on the improvement of the strength and shrinkage cracking property of SCC. It is recommended that the rate of expander admixture should be about 6%. For this rate, the compressive strength of SCC increases about 8% by the 28th day, and the shrinkage cracking of SCC does not appear.
机译：本文介绍了在自密实混凝土（SCC）中使用膨胀剂外加剂及其对混凝土混合物的强度和收缩开裂性能的影响的研究。膨胀剂外加剂的应用已经极大地改善了SCC的强度和收缩开裂性能。此外，膨胀剂混合物已经为在建筑业中使用次级原料提供了有趣的可能性。在江苏省南京市苏博特材料有限公司的人造砂和高减水剂“ PCA-II”上进行了实验。结果表明，人工砂中存在膨胀剂掺合料，骨料级配，试件尺寸等。对提高SCC的强度和收缩开裂性能具有重要影响。建议膨胀剂外加剂的比例应为6％左右。以该速率，到第28天，SCC的抗压强度增加了约8％，并且没有出现SCC的收缩裂纹。

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