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A platform for research: civil engineering, architecture and urbanism
Anti-crack ballastless track roadbed slab concrete and preparation method thereof
The invention provides anti-crack ballastless track roadbed slab concrete and a preparation method thereof. The concrete is prepared from the following raw material components in percentage by mass: 9.0 to 10.0 percent of cement, 0.5 to 1.0 percent of a magnesium oxide expanding agent, 0.1 to 0.3 percent of a shrinkage reducing agent, 6.0 to 7.0 percent of fly ash, 48.0 to 49.0 percent of coarse aggregate, 29.0 to 30.0 percent of fine aggregate, 0.05 to 0.1 percent of a polycarboxylic acid water reducing agent and 5.2 to 5.5 percent of water. And the cement is low-heat cement. The preparation method comprises the following steps: preparing a premix, and curing to obtain the anti-crack ballastless track roadbed slab concrete. The initial cracking time of the roadbed slab concrete can be delayed, and the crack resistance of the roadbed slab concrete is improved.
本发明提供了一种抗裂无砟轨道道床板混凝土及其制备方法，该混凝土包括以下质量百分数的原料组分：水泥9.0％‑10.0％、氧化镁膨胀剂0.5％‑1.0％、减缩剂0.1％‑0.3％、粉煤灰6.0％‑7.0％、粗骨料48.0％‑49.0％、细骨料29.0％‑30.0％、聚羧酸减水剂0.05％‑0.1％以及水5.2％‑5.5％；所述水泥为低热水泥。该制备方法先制得预混料，再经过养护制得所述抗裂无砟轨道道床板混凝土。本发明能够延迟道床板混凝土的初始开裂时间，提升道床板混凝土的抗裂性能。
Anti-crack ballastless track roadbed slab concrete and preparation method thereof
The invention provides anti-crack ballastless track roadbed slab concrete and a preparation method thereof. The concrete is prepared from the following raw material components in percentage by mass: 9.0 to 10.0 percent of cement, 0.5 to 1.0 percent of a magnesium oxide expanding agent, 0.1 to 0.3 percent of a shrinkage reducing agent, 6.0 to 7.0 percent of fly ash, 48.0 to 49.0 percent of coarse aggregate, 29.0 to 30.0 percent of fine aggregate, 0.05 to 0.1 percent of a polycarboxylic acid water reducing agent and 5.2 to 5.5 percent of water. And the cement is low-heat cement. The preparation method comprises the following steps: preparing a premix, and curing to obtain the anti-crack ballastless track roadbed slab concrete. The initial cracking time of the roadbed slab concrete can be delayed, and the crack resistance of the roadbed slab concrete is improved.
本发明提供了一种抗裂无砟轨道道床板混凝土及其制备方法，该混凝土包括以下质量百分数的原料组分：水泥9.0％‑10.0％、氧化镁膨胀剂0.5％‑1.0％、减缩剂0.1％‑0.3％、粉煤灰6.0％‑7.0％、粗骨料48.0％‑49.0％、细骨料29.0％‑30.0％、聚羧酸减水剂0.05％‑0.1％以及水5.2％‑5.5％；所述水泥为低热水泥。该制备方法先制得预混料，再经过养护制得所述抗裂无砟轨道道床板混凝土。本发明能够延迟道床板混凝土的初始开裂时间，提升道床板混凝土的抗裂性能。
Anti-crack ballastless track roadbed slab concrete and preparation method thereof
一种抗裂无砟轨道道床板混凝土及其制备方法
YUAN QIANG (author) / CAI HUANGYI (author) / CHEN NAIWU (author) / CHEN GUOSHUN (author) / RAO HUIMING (author) / ZHANG ZHIPENG (author) / CHEN QIQIANG (author) / HUANG ZHIBIN (author) / FANG LEI (author) / WANG XIONGBIAO (author)
2023-04-18
Patent
Electronic Resource
Chinese
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