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Quantitative design method for mix proportion of machine-made sand self-compacting concrete based on aggregate grain shape
The invention relates to a quantitative design method for mix proportion of machine-made sand self-compacting concrete based on aggregate grain shape. The quantitative design method comprises the following steps: 1) determining the performance of proportioned raw materials; 2) obtaining the sphere similarity of machine-made sand and coarse aggregate, and calculating a grain shape function; 3) determining the volume fraction relationship among the components in the concrete per unit volume according to the grain shape function of the machine-made sand and the coarse aggregate; 4) calculating awater-binder ratio according to the design strength; 5) determining the water consumption of stone powder; 6) determining the mass of each component according to the relationship among the componentsin the concrete per unit volume; 7) adjusting the dosage of an admixture according to the workability requirement; and 8) adjusting the mixing amount of fly ash according to the strength, and repeating the processes 5)-8) until the strength requirement is met. Compared with the prior art, the method of the invention has the advantages of being simple, clear, time-saving, labor-saving, good in slump, expansibility and cohesiveness and the like.
本发明涉及一种基于骨料粒形的机制砂自密实混凝土配合比定量设计方法，包括步骤：1)测定配比原材料的性能；2)获取机制砂和粗骨料的球体类似度，计算粒形函数；3)根据机制砂和粗骨料的粒形函数确定单位体积混凝土中组分间的体积分数关系；4)根据设计强度计算水胶比；5)确定石粉用水量；6)根据单位体积混凝土中组分间关系确定各组分质量；7)根据工作性要求调整外加剂用量；8)根据强度调整粉煤灰掺量，重复过程5)～8)，直至满足强度要求。与现有技术相比，本发明具有方法简单明确、省时省力、具有较好的坍落度、扩展度和粘聚性等优点。
Quantitative design method for mix proportion of machine-made sand self-compacting concrete based on aggregate grain shape
The invention relates to a quantitative design method for mix proportion of machine-made sand self-compacting concrete based on aggregate grain shape. The quantitative design method comprises the following steps: 1) determining the performance of proportioned raw materials; 2) obtaining the sphere similarity of machine-made sand and coarse aggregate, and calculating a grain shape function; 3) determining the volume fraction relationship among the components in the concrete per unit volume according to the grain shape function of the machine-made sand and the coarse aggregate; 4) calculating awater-binder ratio according to the design strength; 5) determining the water consumption of stone powder; 6) determining the mass of each component according to the relationship among the componentsin the concrete per unit volume; 7) adjusting the dosage of an admixture according to the workability requirement; and 8) adjusting the mixing amount of fly ash according to the strength, and repeating the processes 5)-8) until the strength requirement is met. Compared with the prior art, the method of the invention has the advantages of being simple, clear, time-saving, labor-saving, good in slump, expansibility and cohesiveness and the like.
本发明涉及一种基于骨料粒形的机制砂自密实混凝土配合比定量设计方法，包括步骤：1)测定配比原材料的性能；2)获取机制砂和粗骨料的球体类似度，计算粒形函数；3)根据机制砂和粗骨料的粒形函数确定单位体积混凝土中组分间的体积分数关系；4)根据设计强度计算水胶比；5)确定石粉用水量；6)根据单位体积混凝土中组分间关系确定各组分质量；7)根据工作性要求调整外加剂用量；8)根据强度调整粉煤灰掺量，重复过程5)～8)，直至满足强度要求。与现有技术相比，本发明具有方法简单明确、省时省力、具有较好的坍落度、扩展度和粘聚性等优点。
Quantitative design method for mix proportion of machine-made sand self-compacting concrete based on aggregate grain shape
基于骨料粒形的机制砂自密实混凝土配合比定量设计方法
JIANG ZHENGWU (author) / REN QIANG (author)
2020-12-29
Patent
Electronic Resource
Chinese
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