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A platform for research: civil engineering, architecture and urbanism
High-mixing-amount stone powder full-machine-made sand C30-C55 concrete and preparation method thereof
The invention provides high-mixing-amount stone powder full-machine-made sand C30-C55 concrete and a preparation method thereof. Each cubic meter of the high-mixing-amount stone powder full-machine-made sand C30-C55 concrete comprises the following raw materials by mass: 300 to 470 kg of cement, 45 to 70 kg of stone powder, 850 to 950 kg of machine-made sand, 900 to 1050 kg of coarse aggregate, 140 to 160 kg of water, 7 to 11 kg of a polycarboxylate superplasticizer and 5 to 7 kg of a hydrotalcite-like powder. The concrete provided by the invention has the following advantages: (1) a by-product stone powder in the production process of the machine-made sand can be consumed, and compared with common concrete of the same grade, the concrete is low in cement consumption, low-carbon and environment-friendly; (2) the problem that the machine-made sand with higher stone powder content is difficult to apply in engineering is solved; (3) the strength is guaranteed, the strength reaches 70-80%of a design value in 3d, and the concrete is suitable for projects with emergency construction period requirements; (4) the corrosion resistance on mediums such as chloride ions and sulfate is good, and the concrete is suitable for working conditions such as coastal and saline-alkali soil; and (5) the absorption on infrared rays by the concrete is increased, the fire resistance of the concrete isenhanced, and the problem of thermal fatigue of the concrete is relieved.
本发明提供了一种高掺量石粉全机制砂C30～C55混凝土及其制备方法。其中的高掺量石粉全机制砂C30～C55混凝土中，每立方所述混凝土中含有以下质量的原材料：水泥300～470kg、石粉45～70kg、机制砂850～950kg、粗骨料900～1050kg、水140～160kg、聚羧酸减水剂7～11kg和类水滑石粉5～7kg。本发明中的混凝土具有如下优点：(1)可消耗机制砂生产过程中的副产品—石粉，与同等级的普通混凝土相比，水泥用量少，低碳环保。(2)解决了石粉含量较大的机制砂工程应用难的问题。(3)强度有保证，3d达到设计值的70～80％，适用于工期要求紧急的项目。(4)具有良好的抗氯离子、硫酸盐等介质的侵蚀性能，适用于沿海、盐碱土等工况。(5)增加了混凝土对红外线的吸收，增强了混凝土的耐火性，减缓了混凝土的热疲劳问题。
High-mixing-amount stone powder full-machine-made sand C30-C55 concrete and preparation method thereof
The invention provides high-mixing-amount stone powder full-machine-made sand C30-C55 concrete and a preparation method thereof. Each cubic meter of the high-mixing-amount stone powder full-machine-made sand C30-C55 concrete comprises the following raw materials by mass: 300 to 470 kg of cement, 45 to 70 kg of stone powder, 850 to 950 kg of machine-made sand, 900 to 1050 kg of coarse aggregate, 140 to 160 kg of water, 7 to 11 kg of a polycarboxylate superplasticizer and 5 to 7 kg of a hydrotalcite-like powder. The concrete provided by the invention has the following advantages: (1) a by-product stone powder in the production process of the machine-made sand can be consumed, and compared with common concrete of the same grade, the concrete is low in cement consumption, low-carbon and environment-friendly; (2) the problem that the machine-made sand with higher stone powder content is difficult to apply in engineering is solved; (3) the strength is guaranteed, the strength reaches 70-80%of a design value in 3d, and the concrete is suitable for projects with emergency construction period requirements; (4) the corrosion resistance on mediums such as chloride ions and sulfate is good, and the concrete is suitable for working conditions such as coastal and saline-alkali soil; and (5) the absorption on infrared rays by the concrete is increased, the fire resistance of the concrete isenhanced, and the problem of thermal fatigue of the concrete is relieved.
本发明提供了一种高掺量石粉全机制砂C30～C55混凝土及其制备方法。其中的高掺量石粉全机制砂C30～C55混凝土中，每立方所述混凝土中含有以下质量的原材料：水泥300～470kg、石粉45～70kg、机制砂850～950kg、粗骨料900～1050kg、水140～160kg、聚羧酸减水剂7～11kg和类水滑石粉5～7kg。本发明中的混凝土具有如下优点：(1)可消耗机制砂生产过程中的副产品—石粉，与同等级的普通混凝土相比，水泥用量少，低碳环保。(2)解决了石粉含量较大的机制砂工程应用难的问题。(3)强度有保证，3d达到设计值的70～80％，适用于工期要求紧急的项目。(4)具有良好的抗氯离子、硫酸盐等介质的侵蚀性能，适用于沿海、盐碱土等工况。(5)增加了混凝土对红外线的吸收，增强了混凝土的耐火性，减缓了混凝土的热疲劳问题。
High-mixing-amount stone powder full-machine-made sand C30-C55 concrete and preparation method thereof
一种高掺量石粉全机制砂C30~C55混凝土及其制备方法
AN MINGZHE (author) / HAN BING (author) / ZHOU JUNYU (author) / LIU MINGHUI (author)
2020-10-23
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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