Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Steam-curing-free concrete containing seed crystal slurry admixture and preparation method thereof
The invention relates to steam-curing-free concrete containing a seed crystal slurry admixture and a preparation method thereof, and belongs to the technical field of building materials. The steam-curing-free concrete is prepared from the following components in parts by mass: 300-500 parts of cement, 100-175 parts of water, 750-800 parts of fine aggregate, 770-800 parts of coarse aggregate, 100-300 parts of seed crystal slurry, 30-120 parts of stone powder, 30-100 parts of a mineral admixture with an aluminum-silicon phase as a main component, 35-65 parts of water, 2-5 parts of a polycarboxylate superplasticizer and 3-10 parts of calcium hydroxide. The preparation method of the steam-curing-free concrete comprises the following steps: 1) proportionally mixing and stirring the cement, fine aggregate and coarse aggregate for 45-90s; 2) adding water and stirring for 90-180s to obtain roughly mixed concrete M; 3) adding the seed crystal slurry S into the roughly mixed concrete M prepared in the step 2), and stirring for 2-5 minutes to obtain concrete slurry; and 3) putting the mixture into a mold and covering, and removing the mold after hardening. According to the method, the reaction product of an admixture and a calcium hydroxide solution is used as a seed crystal for cement hydration to improve the early strength, and adverse effects of a finer admixture on the workability are improved through step-by-step stirring.
本发明涉及一种含晶种浆体掺合料的免蒸养混凝土及其制备方法，属于建筑材料技术领域，其由以下质量份组成：水泥300‑500份、水100‑175份、细骨料750‑800份、粗骨料770‑800份和晶种浆体100‑300份。晶种浆体由石粉30‑120份，以铝硅相为主要成分的矿物掺合料30‑100份，水35‑65份、聚羧酸减水剂2‑5份和氢氧化钙3‑10份组成。免蒸养混凝土的制备方法为：1)将水泥、细骨料、粗骨料按比例混合搅拌45‑90s；2)加水搅拌90‑180s，得到粗拌混凝土M；3)将晶种浆体S加入步骤2)制得的粗拌混凝土M中，搅拌2‑5min后得到混凝土浆体；3)将其装入模具并覆盖，待硬化后拆模制得。该方法利用掺合料和氢氧化钙溶液的反应产物作为水泥水化的晶种改善早期强度，并通过分步搅拌改善较细掺合料对工作性的不利影响。
Steam-curing-free concrete containing seed crystal slurry admixture and preparation method thereof
The invention relates to steam-curing-free concrete containing a seed crystal slurry admixture and a preparation method thereof, and belongs to the technical field of building materials. The steam-curing-free concrete is prepared from the following components in parts by mass: 300-500 parts of cement, 100-175 parts of water, 750-800 parts of fine aggregate, 770-800 parts of coarse aggregate, 100-300 parts of seed crystal slurry, 30-120 parts of stone powder, 30-100 parts of a mineral admixture with an aluminum-silicon phase as a main component, 35-65 parts of water, 2-5 parts of a polycarboxylate superplasticizer and 3-10 parts of calcium hydroxide. The preparation method of the steam-curing-free concrete comprises the following steps: 1) proportionally mixing and stirring the cement, fine aggregate and coarse aggregate for 45-90s; 2) adding water and stirring for 90-180s to obtain roughly mixed concrete M; 3) adding the seed crystal slurry S into the roughly mixed concrete M prepared in the step 2), and stirring for 2-5 minutes to obtain concrete slurry; and 3) putting the mixture into a mold and covering, and removing the mold after hardening. According to the method, the reaction product of an admixture and a calcium hydroxide solution is used as a seed crystal for cement hydration to improve the early strength, and adverse effects of a finer admixture on the workability are improved through step-by-step stirring.
本发明涉及一种含晶种浆体掺合料的免蒸养混凝土及其制备方法，属于建筑材料技术领域，其由以下质量份组成：水泥300‑500份、水100‑175份、细骨料750‑800份、粗骨料770‑800份和晶种浆体100‑300份。晶种浆体由石粉30‑120份，以铝硅相为主要成分的矿物掺合料30‑100份，水35‑65份、聚羧酸减水剂2‑5份和氢氧化钙3‑10份组成。免蒸养混凝土的制备方法为：1)将水泥、细骨料、粗骨料按比例混合搅拌45‑90s；2)加水搅拌90‑180s，得到粗拌混凝土M；3)将晶种浆体S加入步骤2)制得的粗拌混凝土M中，搅拌2‑5min后得到混凝土浆体；3)将其装入模具并覆盖，待硬化后拆模制得。该方法利用掺合料和氢氧化钙溶液的反应产物作为水泥水化的晶种改善早期强度，并通过分步搅拌改善较细掺合料对工作性的不利影响。
Steam-curing-free concrete containing seed crystal slurry admixture and preparation method thereof
一种含晶种浆体掺合料的免蒸养混凝土及其制备方法
ZHANG YAMEI (Autor:in) / HU JIAYUAN (Autor:in)
23.04.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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