Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Dry-mixed high-strength fine aggregate concrete and preparation process thereof
The invention relates to the technical field of concrete, in particular to dry-mixed high-strength fine aggregate concrete and a preparation process thereof. The preparation method comprises the following steps: mixing mineral powder, silica fume, fly ash, a modified water reducing agent, a defoaming agent, an expanding agent and an early strength agent to obtain a premixed admixture; portland cement, fine stone and sand are stirred, and then the premixed admixture is added, so that the dry-mixed high-strength and early-strength fine stone concrete is obtained; the preparation method of the modified water reducing agent comprises the following steps: (1) reacting 3, 4-dihydroxyphenylacetic acid with methyl allyl polyoxyethylene ether to obtain an esterified intermediate; (2) reacting undecylenic acid with chlorodimethylsilane to obtain chlorine-containing carboxyl silane; (3) reacting the esterification intermediate with chlorine-containing carboxyl silane to obtain a dicarboxyl silane monomer; and (4) carrying out polymerization reaction on the dicarboxyl silane monomer, acrylic acid and sodium methallyl sulfonate to obtain the modified water reducing agent. The prepared fine aggregate concrete is added with water on site, and is convenient to operate, good in fluidity and high in strength after curing.
本发明涉及混凝土技术领域，具体为一种干拌高强细石混凝土及其制备工艺。本发明将矿粉、硅灰、粉煤灰、改性减水剂、消泡剂、膨胀剂、早强剂混合得到预拌外加剂；将硅酸盐水泥、细石、砂子搅拌后加入预拌外加剂，得到干拌高强早强细石混凝土；所述改性减水剂的制备方法：(1)将3,4‑二羟基苯乙酸与甲基烯丙基聚氧乙烯醚反应得到酯化中间体；(2)将十一烯酸和氯二甲基硅烷反应得到含氯羧基硅烷；(3)将酯化中间体和含氯羧基硅烷反应得到二羧基硅烷单体；(4)将二羧基硅烷单体、丙烯酸、甲基丙烯磺酸钠聚合反应，得到改性减水剂。本发明制备的细石混凝土现场加水，操作方便且流动性好，养护后强度高。
Dry-mixed high-strength fine aggregate concrete and preparation process thereof
The invention relates to the technical field of concrete, in particular to dry-mixed high-strength fine aggregate concrete and a preparation process thereof. The preparation method comprises the following steps: mixing mineral powder, silica fume, fly ash, a modified water reducing agent, a defoaming agent, an expanding agent and an early strength agent to obtain a premixed admixture; portland cement, fine stone and sand are stirred, and then the premixed admixture is added, so that the dry-mixed high-strength and early-strength fine stone concrete is obtained; the preparation method of the modified water reducing agent comprises the following steps: (1) reacting 3, 4-dihydroxyphenylacetic acid with methyl allyl polyoxyethylene ether to obtain an esterified intermediate; (2) reacting undecylenic acid with chlorodimethylsilane to obtain chlorine-containing carboxyl silane; (3) reacting the esterification intermediate with chlorine-containing carboxyl silane to obtain a dicarboxyl silane monomer; and (4) carrying out polymerization reaction on the dicarboxyl silane monomer, acrylic acid and sodium methallyl sulfonate to obtain the modified water reducing agent. The prepared fine aggregate concrete is added with water on site, and is convenient to operate, good in fluidity and high in strength after curing.
本发明涉及混凝土技术领域，具体为一种干拌高强细石混凝土及其制备工艺。本发明将矿粉、硅灰、粉煤灰、改性减水剂、消泡剂、膨胀剂、早强剂混合得到预拌外加剂；将硅酸盐水泥、细石、砂子搅拌后加入预拌外加剂，得到干拌高强早强细石混凝土；所述改性减水剂的制备方法：(1)将3,4‑二羟基苯乙酸与甲基烯丙基聚氧乙烯醚反应得到酯化中间体；(2)将十一烯酸和氯二甲基硅烷反应得到含氯羧基硅烷；(3)将酯化中间体和含氯羧基硅烷反应得到二羧基硅烷单体；(4)将二羧基硅烷单体、丙烯酸、甲基丙烯磺酸钠聚合反应，得到改性减水剂。本发明制备的细石混凝土现场加水，操作方便且流动性好，养护后强度高。
Dry-mixed high-strength fine aggregate concrete and preparation process thereof
一种干拌高强细石混凝土及其制备工艺
CHAI ZHAOQUAN (Autor:in) / LONG ZHUAN (Autor:in) / HE ZHUANGKE (Autor:in) / ZHAO ZONGDA (Autor:in)
15.11.2024
Patent
Elektronische Ressource
Chinesisch
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