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High-crack-resistance low-shrinkage premixed concrete and preparation method thereof
The invention belongs to the technical field of concrete, and particularly relates to high-crack-resistance low-shrinkage premixed concrete and a preparation method thereof. The high-crack-resistance low-shrinkage premixed concrete is prepared from the following raw materials in parts by weight: 80 to 100 parts of moderate heat Portland cement, 65 to 75 parts of silane modified fly ash, 50 to 60 parts of acrylate grafted modified zeolite, 10 to 15 parts of polypropylene fiber, 260 to 320 parts of fine aggregate, 300 to 400 parts of coarse aggregate, 2 to 3.5 parts of a water reducing agent, 4 to 6 parts of a magnesium oxide expanding agent, 1 to 1.5 parts of a nonionic surfactant and 60 to 80 parts of water. According to the invention, the defect that the concrete is easy to shrink and crack due to a large-dosage mineral admixture is effectively improved, the anti-crack grade of the concrete is improved, the shrinkage rate of the concrete is reduced, and the durability of the concrete is improved.
本发明属于混凝土技术领域，具体涉及一种高抗裂低收缩预拌混凝土及其制备方法。一种高抗裂低收缩预拌混凝土，按重量份计，其制备原料包括中热硅酸盐水泥80‑100份、硅烷改性粉煤灰65‑75份、丙烯酸酯接枝改性沸石50‑60份、聚丙烯纤维10‑15份、细骨料260‑320份、粗骨料300‑400份、减水剂2‑3.5份、氧化镁膨胀剂4‑6份、非离子表面活性剂1‑1.5份和水60‑80份。本申请有效改善大掺量矿物掺合料易导致混凝土收缩开裂的缺陷，提高了改善了混凝土的抗裂等级，降低了混凝土的收缩率，提高了混凝土的耐久性能。
High-crack-resistance low-shrinkage premixed concrete and preparation method thereof
The invention belongs to the technical field of concrete, and particularly relates to high-crack-resistance low-shrinkage premixed concrete and a preparation method thereof. The high-crack-resistance low-shrinkage premixed concrete is prepared from the following raw materials in parts by weight: 80 to 100 parts of moderate heat Portland cement, 65 to 75 parts of silane modified fly ash, 50 to 60 parts of acrylate grafted modified zeolite, 10 to 15 parts of polypropylene fiber, 260 to 320 parts of fine aggregate, 300 to 400 parts of coarse aggregate, 2 to 3.5 parts of a water reducing agent, 4 to 6 parts of a magnesium oxide expanding agent, 1 to 1.5 parts of a nonionic surfactant and 60 to 80 parts of water. According to the invention, the defect that the concrete is easy to shrink and crack due to a large-dosage mineral admixture is effectively improved, the anti-crack grade of the concrete is improved, the shrinkage rate of the concrete is reduced, and the durability of the concrete is improved.
本发明属于混凝土技术领域，具体涉及一种高抗裂低收缩预拌混凝土及其制备方法。一种高抗裂低收缩预拌混凝土，按重量份计，其制备原料包括中热硅酸盐水泥80‑100份、硅烷改性粉煤灰65‑75份、丙烯酸酯接枝改性沸石50‑60份、聚丙烯纤维10‑15份、细骨料260‑320份、粗骨料300‑400份、减水剂2‑3.5份、氧化镁膨胀剂4‑6份、非离子表面活性剂1‑1.5份和水60‑80份。本申请有效改善大掺量矿物掺合料易导致混凝土收缩开裂的缺陷，提高了改善了混凝土的抗裂等级，降低了混凝土的收缩率，提高了混凝土的耐久性能。
High-crack-resistance low-shrinkage premixed concrete and preparation method thereof
一种高抗裂低收缩预拌混凝土及其制备方法
LI JIAHONG (author) / HU GANG (author) / GE AITING (author) / ZHOU LONGSHENG (author)
2023-10-31
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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