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A platform for research: civil engineering, architecture and urbanism
Early-strength low-shrinkage concrete and preparation method thereof
The invention provides early-strength low-shrinkage concrete and a preparation method thereof.The early-strength low-shrinkage concrete is prepared from, by weight, 15%-25% of cement, 20%-40% of aggregate, 8%-15% of coal gangue, 15%-40% of building waste, 1%-5% of modified mineral powder, 0.1%-0.5% of a polycarboxylic acid type high-performance mixing water reducing agent and the balance mixing water.The early-strength low-shrinkage concrete has the advantages that through reasonable raw material selecting and matching and targeted process optimization, the building waste is efficiently utilized, environmental protection is achieved, the auxiliary cooperation effect among the components is enhanced, the concrete structure and performance stability are improved by one time or above, the 28d compressive strength can reach 60 MPa or above, the cracking rate is effectively reduced, and comprehensive benefits are remarkably improved.
本发明提出了一种早强型低收缩混凝土及其制备方法，该混凝土包括以下百分含量组分：水泥15‑25wt%、骨料20‑40wt%、煤矸石8‑15wt%、建筑废料15‑40wt%、改性矿粉1‑5wt%、聚羧酸系高性能减拌合水剂0.1‑0.5wt%、拌合水余量，本申请通过合理的原料选配和针对性的工艺优化，高效利用建筑废料，绿色环保，强化组分间辅配协作效果，混凝土结构、性能稳定性提高了一倍以上，28d抗压强度可达60MPa以上，且有效降低了开裂率，综合效益显著提高。
Early-strength low-shrinkage concrete and preparation method thereof
The invention provides early-strength low-shrinkage concrete and a preparation method thereof.The early-strength low-shrinkage concrete is prepared from, by weight, 15%-25% of cement, 20%-40% of aggregate, 8%-15% of coal gangue, 15%-40% of building waste, 1%-5% of modified mineral powder, 0.1%-0.5% of a polycarboxylic acid type high-performance mixing water reducing agent and the balance mixing water.The early-strength low-shrinkage concrete has the advantages that through reasonable raw material selecting and matching and targeted process optimization, the building waste is efficiently utilized, environmental protection is achieved, the auxiliary cooperation effect among the components is enhanced, the concrete structure and performance stability are improved by one time or above, the 28d compressive strength can reach 60 MPa or above, the cracking rate is effectively reduced, and comprehensive benefits are remarkably improved.
本发明提出了一种早强型低收缩混凝土及其制备方法，该混凝土包括以下百分含量组分：水泥15‑25wt%、骨料20‑40wt%、煤矸石8‑15wt%、建筑废料15‑40wt%、改性矿粉1‑5wt%、聚羧酸系高性能减拌合水剂0.1‑0.5wt%、拌合水余量，本申请通过合理的原料选配和针对性的工艺优化，高效利用建筑废料，绿色环保，强化组分间辅配协作效果，混凝土结构、性能稳定性提高了一倍以上，28d抗压强度可达60MPa以上，且有效降低了开裂率，综合效益显著提高。
Early-strength low-shrinkage concrete and preparation method thereof
一种早强型低收缩混凝土及其制备方法
QUE SHUISHENG (author)
2021-12-14
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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