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Preparation and fluidity control method of high-content stone powder low-viscosity machine-made sand concrete
The invention provides a preparation method and fluidity control method of high-dosage stone powder low-viscosity machine-made sand concrete, and the preparation method comprises the following steps: (1) determining the median particle size of stone powder to be d50, and counting the component of which the particle size does not exceed 75 microns in the stone powder to be A%; (2) determining the mixing amount of the stone powder in the concrete according to the d50; (3) determining a reference concrete mix proportion, replacing fly ash with A% of a component with the stone powder particle size of not more than 75 [mu] m, replacing machine-made sand with 1-A% of a component with the stone powder particle size of more than 75 [mu] m, and keeping the rest components unchanged to obtain a stone powder concrete mix proportion; and (4) testing the initial slumps D and Dx of the reference concrete and the stone powder concrete and the emptying time T and Tx of the inverted slump cylinder, and adjusting the viscosity of the concrete according to the D-DX and the T-TX.
本发明提供了一种大掺量石粉低粘度机制砂混凝土的制备方法及流动性控制方法，该制备方法包括：(1)、确定石粉的中值粒径为d50，并统计石粉粒径不超过75μm的组分为A％；(2)、根据d50，确定石粉在混凝土中的掺量；(3)、确定基准混凝土配合比，将石粉粒径不超过75μm的组分A％代替粉煤灰，超过75μm的组分(1‑A％)代替机制砂，其余组份保持不变，得石粉混凝土配合比；(4)、测试基准混凝土、石粉混凝土的初始坍落度D、Dx和倒置坍落筒排空时间T、Tx，并根据|D‑DX|和|T‑TX|的大小调节混凝土的粘度。
Preparation and fluidity control method of high-content stone powder low-viscosity machine-made sand concrete
The invention provides a preparation method and fluidity control method of high-dosage stone powder low-viscosity machine-made sand concrete, and the preparation method comprises the following steps: (1) determining the median particle size of stone powder to be d50, and counting the component of which the particle size does not exceed 75 microns in the stone powder to be A%; (2) determining the mixing amount of the stone powder in the concrete according to the d50; (3) determining a reference concrete mix proportion, replacing fly ash with A% of a component with the stone powder particle size of not more than 75 [mu] m, replacing machine-made sand with 1-A% of a component with the stone powder particle size of more than 75 [mu] m, and keeping the rest components unchanged to obtain a stone powder concrete mix proportion; and (4) testing the initial slumps D and Dx of the reference concrete and the stone powder concrete and the emptying time T and Tx of the inverted slump cylinder, and adjusting the viscosity of the concrete according to the D-DX and the T-TX.
本发明提供了一种大掺量石粉低粘度机制砂混凝土的制备方法及流动性控制方法，该制备方法包括：(1)、确定石粉的中值粒径为d50，并统计石粉粒径不超过75μm的组分为A％；(2)、根据d50，确定石粉在混凝土中的掺量；(3)、确定基准混凝土配合比，将石粉粒径不超过75μm的组分A％代替粉煤灰，超过75μm的组分(1‑A％)代替机制砂，其余组份保持不变，得石粉混凝土配合比；(4)、测试基准混凝土、石粉混凝土的初始坍落度D、Dx和倒置坍落筒排空时间T、Tx，并根据|D‑DX|和|T‑TX|的大小调节混凝土的粘度。
Preparation and fluidity control method of high-content stone powder low-viscosity machine-made sand concrete
大掺量石粉低粘度机制砂混凝土的制备及流动性控制方法
DU ZENGQIANG (author) / YANG LIXIANG (author) / LU DEHUA (author) / WANG XING (author) / FAN JUNJIANG (author) / HAN YUNTING (author) / XU XIAO (author) / SHI ZHONGYI (author)
2023-08-15
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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