| 机制砂混凝土耐磨性的主要影响因素分析及多因素计算模型 |
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| 引用本文： | 谢吉程,张云,杜越明,陈正,罗婷倚,唐亚森.机制砂混凝土耐磨性的主要影响因素分析及多因素计算模型[J].硅酸盐通报,2020,39(12):3812-3822. |
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| 作者姓名： | 谢吉程 张云 杜越明 陈正 罗婷倚 唐亚森 |
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| 作者单位： | 1.广西大学土木建筑工程学院,工程防灾与结构安全教育部重点实验室,南宁 530004;2.广西大学,广西防灾减灾与工程安全重点实验室,南宁 530004;3.广西翔路建设有限责任公司,南宁 530029 |
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| 基金项目： | 国家自然科学基金(51738004,51762004);广西创新驱动发展专项(GKAA18242007,GKAA18118029) |
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| 摘 要： | 本文研究了砂类型、砂率、石粉含量和抗压强度对机制砂混凝土耐磨性的影响,建立了磨损量的多因素计算模型。结果表明:由于含石粉及具有更高的粗糙度和坚固性,石灰岩与辉绿岩机制砂制备的C30、C40混凝土耐磨性比河砂混凝土提高20%以上;在0.40~0.44范围内选取较低的砂率可获得较优的耐磨性;利用石粉含量为5%~11%(质量分数)的机制砂制备混凝土,石粉含量为9%时可获得最佳的混凝土耐磨性,微观分析表明此时混凝土密实度最佳;通过灰色系统理论确定了耐磨性影响因素的影响程度排序为:砂率R3>压碎值R2>粗糙度R1>抗压强度R5>石粉含量R4>0.6;对比验证表明提出的混凝土磨损量多因素计算模型具有较高的预测精度和良好的适用性。
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| 关 键 词： | 机制砂 混凝土 耐磨性 灰色系统 多因素模型 |
Analysis of Major Influence Factors and Multi-Factor Calculation Model of Abrasion Resistance of Manufactured Sand Concrete |
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| XIE Jicheng,ZHANG Yun,DU Yueming,CHEN Zheng,LUO Tingyi,TANG Yasen.Analysis of Major Influence Factors and Multi-Factor Calculation Model of Abrasion Resistance of Manufactured Sand Concrete[J].Bulletin of the Chinese Ceramic Society,2020,39(12):3812-3822. |
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| Authors: | XIE Jicheng ZHANG Yun DU Yueming CHEN Zheng LUO Tingyi TANG Yasen |
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| Affiliation: | 1. Key Laboratory of Engineering Disaster Prevention and Structural Safety of Ministry of Eduction, College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China; 2. Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning 530004, China;3. Guangxi Xianglu Construction Co., Ltd., Nanning 530029, China |
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| Abstract: | The influences of sand type, sand rate, stone powder content and compressive strength on the abrasion resistance of manufactured sand concrete were studied and a multi-factor calculation model of abrasion loss was established. The results show that the abrasion resistance of C30 and C40 concrete prepared from limestone manufactured sand and diabase manufactured sand increase by more than 20% compared to that of river sand because manufactured sand has stone powder, higher roughness and soundness. Better abrasion resistance of concrete obtains by selecting lower sand rate in the range of 0.40 to 0.44. The concrete is prepared by using the manufactured sand with 5% to 11% (mass fraction) stone powder content, and the abrasion resistance of concrete shows the best when the stone powder content is 9%, because the compactness of concrete achieves the best at this time through microscopic analysis. The grey system theory is utilized to determine the influence degree of the factors affecting the abrasion resistance, and the influence degree is ranked as follows: sand rate R3> crushing value R2> roughness R1> compressive strength R5> stone powder content R4>0.6. The comparison and verification indicate that the proposed multi-factor calculation model of the abrasion loss of concrete has higher prediction accuracy and more excellent applicability. |
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| Keywords: | manufactured sand concrete abrasion resistance grey system multi-factor model |
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