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Corrosion-resistant high-performance concrete and preparation method thereof
The invention discloses corrosion-resistant high-performance concrete and a preparation method thereof. The corrosion-resistant high-performance concrete is prepared from the following raw materials in parts by weight: 50-80 parts of cement, 20-40 parts of fine aggregate, 15-30 parts of coarse aggregate, 10-16 parts of ground fly ash, 15-25 parts of slag, 5-10 parts of silica fume, 20-40 parts ofadmixture, 6-10 parts of asbestos fiber and 0.6-0.9 part of composite water reducing agent. According to the preparation method of the corrosion-resistant high-performance concrete, ground fly ash issubjected to secondary hydration with Ca (OH) 2 generated by cement hydration under the dual action of sulfate and an alkali activator, hydrated calcium silicate with a low calcium-silicon ratio and compact sulfate which are more stable under a low-alkali condition are generated, and pores in the concrete are filled with the hydrated calcium silicate and the compact sulfate, The hydrated calcium silicate and the compact sulfate become effective components of the concrete structure, and the permeability of the concrete is reduced, so that SO4<2-> ions entering the concrete are reduced, and thesulfate corrosion resistance of the concrete is improved.
本发明公开了一种耐腐蚀高性能混凝土及其制备方法，其原料按重量份具体包括水泥50‑80份、细骨料20‑40份、粗骨料15‑30份、磨细粉煤灰10‑16份、矿渣15‑25份、硅灰5‑10份、掺合料20‑40份、石棉纤维6‑10份和复合减水剂0.6‑0.9份。该耐腐蚀高性能混凝土的制备方法，通过磨细粉煤灰在硫酸盐和碱激发剂的双重作用下，与水泥水化产生的Ca(OH)2发生二次水化，生成在低碱条件下更稳定的低钙硅比的水化硅酸钙和致密的硫酸盐，填充于混凝土内部中的孔隙，成为混凝土结构的有效成分，减小了混凝土的渗透性，从而减少了进入混凝土中的SO42‑离子，改善了混凝土的抗硫酸盐侵蚀性能。
Corrosion-resistant high-performance concrete and preparation method thereof
The invention discloses corrosion-resistant high-performance concrete and a preparation method thereof. The corrosion-resistant high-performance concrete is prepared from the following raw materials in parts by weight: 50-80 parts of cement, 20-40 parts of fine aggregate, 15-30 parts of coarse aggregate, 10-16 parts of ground fly ash, 15-25 parts of slag, 5-10 parts of silica fume, 20-40 parts ofadmixture, 6-10 parts of asbestos fiber and 0.6-0.9 part of composite water reducing agent. According to the preparation method of the corrosion-resistant high-performance concrete, ground fly ash issubjected to secondary hydration with Ca (OH) 2 generated by cement hydration under the dual action of sulfate and an alkali activator, hydrated calcium silicate with a low calcium-silicon ratio and compact sulfate which are more stable under a low-alkali condition are generated, and pores in the concrete are filled with the hydrated calcium silicate and the compact sulfate, The hydrated calcium silicate and the compact sulfate become effective components of the concrete structure, and the permeability of the concrete is reduced, so that SO4<2-> ions entering the concrete are reduced, and thesulfate corrosion resistance of the concrete is improved.
本发明公开了一种耐腐蚀高性能混凝土及其制备方法，其原料按重量份具体包括水泥50‑80份、细骨料20‑40份、粗骨料15‑30份、磨细粉煤灰10‑16份、矿渣15‑25份、硅灰5‑10份、掺合料20‑40份、石棉纤维6‑10份和复合减水剂0.6‑0.9份。该耐腐蚀高性能混凝土的制备方法，通过磨细粉煤灰在硫酸盐和碱激发剂的双重作用下，与水泥水化产生的Ca(OH)2发生二次水化，生成在低碱条件下更稳定的低钙硅比的水化硅酸钙和致密的硫酸盐，填充于混凝土内部中的孔隙，成为混凝土结构的有效成分，减小了混凝土的渗透性，从而减少了进入混凝土中的SO42‑离子，改善了混凝土的抗硫酸盐侵蚀性能。
Corrosion-resistant high-performance concrete and preparation method thereof
一种耐腐蚀高性能混凝土及其制备方法
WANG WENJIE (author)
2021-03-16
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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