| 机制砂-石屑复合细集料对不同强度等级混凝土性能的影响 |
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| 引用本文： | 童小根,张凯峰,孟刚,罗作球,胡宇博,王佳敏,王博,王国峰.机制砂-石屑复合细集料对不同强度等级混凝土性能的影响[J].硅酸盐通报,2021,40(4):1205-1212. |
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| 作者姓名： | 童小根 张凯峰 孟刚 罗作球 胡宇博 王佳敏 王博 王国峰 |
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| 作者单位： | 中建西部建设北方有限公司,西安 710065 |
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| 基金项目： | 中建西部建设科技研发计划(ZJXJ-2019-08) |
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| 摘 要： | 为了合理利用机制砂、石屑组成的复合砂,从而缓解天然河砂的不足,通过采用级配合成计算的方法快速确定两者之间的最佳搭配比例,以获得满足国家规范II区中砂技术指标要求的复合砂。分别研究了不同掺配比例的复合砂对C30~C50强度等级混凝土工作性、力学性能及耐久性能的影响。结果表明,不同组合比例的复合砂对混凝土性能具有不同程度的改善作用,当机制砂与石屑二者的比例为6c∶4(质量比)时,各强度等级混凝土综合性能最优。
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| 关 键 词： | 机制砂 石屑 工作性能 力学性能 耐久性能 经济性 |
| 收稿时间： | 2020-12-11 |
Influence of Manufactured Sand-Stone Chips Composite Fine Aggregate on Properties of Different Strength Grade Concrete |
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| TONG Xiaogen,ZHANG Kaifeng,MENG Gang,LUO Zuoqiu,HU Yubo,WANG Jiamin,WANG Bo,WANG Guofeng.Influence of Manufactured Sand-Stone Chips Composite Fine Aggregate on Properties of Different Strength Grade Concrete[J].Bulletin of the Chinese Ceramic Society,2021,40(4):1205-1212. |
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| Authors: | TONG Xiaogen ZHANG Kaifeng MENG Gang LUO Zuoqiu HU Yubo WANG Jiamin WANG Bo WANG Guofeng |
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| Affiliation: | China West Construction North Co., Ltd., Xi’an 710065, China |
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| Abstract: | In order to make rational use of the composite sand composed of manufactured sand and stone chips to alleviate the deficiency of natural river sand, the optimal matching ratio between them was determined quickly by using the method of grade-combination calculation, so as to obtain the composite sand that meets the technical requirements of sand in area II of the national standard. Then, the effects of composite sand with different compound ratio on the workability, mechanical properties and durability of C30 to C50 strength grade concrete were studied respectively. The results show that, different combination ratio of composite sand improve the performance of concrete to different degrees. When the ratio of manufactured sand to stone chips is 6∶4 (mass ratio), the comprehensive performance of each strength grade concrete is the best. |
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| Keywords: | manufactured sand stone chip workability mechanical property durability economy |
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