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Composite mineral admixture for large-volume raft concrete and preparation method of composite mineral admixture
The invention belongs to the technical field of building materials. The invention relates to the field of concrete, in particular to a composite mineral admixture for large-volume raft concrete and a preparation method of the composite mineral admixture. The prepared product comprises fly ash and silica fume. Wherein the mass ratio of the fly ash to the silica fume is (2.5: 1)-(3.5: 1); the D50 of the fly ash is 80 to 90 [mu] m; the D50 of the silica fume is 0.15 to 0.25 time of the D50 of the fly ash; the surface of the fly ash comprises a carbon coating layer; and the mass of the carbon-coated layer is 10-12% of the mass of the fly ash. In the silica fume, the content of the Fe element is 0.010 to 0.015 percent; in addition, blast furnace slag powder accounting for 20-25% of the mass of the silica fume is further included. The D50 of the blast furnace slag powder is 0.5-0.6 time that of the fly ash. The porosity of the blast furnace slag powder is 40-50%; the porosity of the fly ash is 55 to 65 percent; the porosity of the silica fume is 10 to 15 percent.
本发明属于建筑材料技术领域。更具体地，涉及一种用于大体积筏板混凝土的复合矿物掺合料及其制备方法。本发制备的产品包括粉煤灰和硅灰；其中，所述粉煤灰和所述硅灰的质量比为2.5：1‑3.5：1；所述粉煤灰的D50为80‑90μm；所述硅灰的D50为所述粉煤灰D50的0.15‑0.25倍；所述粉煤灰的表面包括包碳层；所述包碳层为所述粉煤灰质量的10‑12％。所述硅灰中，Fe元素的含量为0.010‑0.015％；另外，还包括硅灰质量20‑25％的高炉矿渣粉；所述高炉矿渣粉的D50为所述粉煤灰的0.5‑0.6倍。所述高炉矿渣粉的孔隙率为40‑50％；所述粉煤灰的孔隙率为55‑65％；所述硅灰的孔隙率为10‑15％。
Composite mineral admixture for large-volume raft concrete and preparation method of composite mineral admixture
The invention belongs to the technical field of building materials. The invention relates to the field of concrete, in particular to a composite mineral admixture for large-volume raft concrete and a preparation method of the composite mineral admixture. The prepared product comprises fly ash and silica fume. Wherein the mass ratio of the fly ash to the silica fume is (2.5: 1)-(3.5: 1); the D50 of the fly ash is 80 to 90 [mu] m; the D50 of the silica fume is 0.15 to 0.25 time of the D50 of the fly ash; the surface of the fly ash comprises a carbon coating layer; and the mass of the carbon-coated layer is 10-12% of the mass of the fly ash. In the silica fume, the content of the Fe element is 0.010 to 0.015 percent; in addition, blast furnace slag powder accounting for 20-25% of the mass of the silica fume is further included. The D50 of the blast furnace slag powder is 0.5-0.6 time that of the fly ash. The porosity of the blast furnace slag powder is 40-50%; the porosity of the fly ash is 55 to 65 percent; the porosity of the silica fume is 10 to 15 percent.
本发明属于建筑材料技术领域。更具体地，涉及一种用于大体积筏板混凝土的复合矿物掺合料及其制备方法。本发制备的产品包括粉煤灰和硅灰；其中，所述粉煤灰和所述硅灰的质量比为2.5：1‑3.5：1；所述粉煤灰的D50为80‑90μm；所述硅灰的D50为所述粉煤灰D50的0.15‑0.25倍；所述粉煤灰的表面包括包碳层；所述包碳层为所述粉煤灰质量的10‑12％。所述硅灰中，Fe元素的含量为0.010‑0.015％；另外，还包括硅灰质量20‑25％的高炉矿渣粉；所述高炉矿渣粉的D50为所述粉煤灰的0.5‑0.6倍。所述高炉矿渣粉的孔隙率为40‑50％；所述粉煤灰的孔隙率为55‑65％；所述硅灰的孔隙率为10‑15％。
Composite mineral admixture for large-volume raft concrete and preparation method of composite mineral admixture
一种用于大体积筏板混凝土的复合矿物掺合料及其制备方法
LIU ZHIQIANG (author) / DU JING (author) / BAI QINQIN (author) / TANG RONG (author) / DENG RUI (author)
2024-07-19
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Mineral admixture, preparation method of mineral admixture and concrete
| European Patent Office | 2023