Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Early-strength low-calcium Portland cement and preparation method thereof
The invention discloses early-strength low-calcium Portland cement and a preparation method thereof. The early-strength low-calcium Portland cement comprises a clinker mixture composed of 95 wt% of minerals and 5 wt% of dihydrate gypsum, and the minerals comprise, by mass, 30%-40% of C3S, 10%-20% of C2S, 15%-25% of C3A and 15%-30% of C4AF; limestone is also included, and the mixing amount of the limestone accounts for 6-15% of the total mass of the clinker mixture. The preparation method comprises the following steps: (1) weighing limestone, fly ash, clay, shale and iron powder as mineral rawmaterials according to the mineral composition, calcining to obtain minerals, and adding dihydrate gypsum to obtain a clinker mixture; and (2) externally doping limestone into the obtained clinker mixture, and grinding to obtain the early-strength low-calcium Portland cement. The early-strength low-calcium Portland cement has high early-stage and later-stage mechanical strength, and because the content requirement of CaO in the clinker is low and the content requirement of CaCO3 (limestone) in the raw materials is low, the heat consumption generated by CaCO3 decomposition during calcination can be significantly reduced, thereby significantly saving energy.
本发明公开了一种早强低钙型硅酸盐水泥及其制备方法。该早强低钙型硅酸盐水泥包括由95wt％的矿物和5wt％的二水石膏组成的熟料混合料，其中，矿物按质量分数计包括：CS 30～40％、CS 10～20％、CA 15～25％、CAF 15～30％；还包括外掺石灰石，石灰石的掺量为熟料混合料总质量的6～15％。其制备方法为：(1)按照矿物组成称取石灰石、粉煤灰、粘土、页岩和铁粉作为矿物原料，煅烧得到矿物，加入二水石膏，得到熟料混合料；(2)在所得熟料混合料中外掺石灰石，粉磨，即得早强低钙型硅酸盐水泥。本发明的早强低钙型硅酸盐水泥早期、后期力学强度均高，而且，由于熟料中CaO含量要求低，对原料中CaCO(石灰石)含量要求低，这可显著降低煅烧时CaCO分解产生的热耗，从而显著节能。
Early-strength low-calcium Portland cement and preparation method thereof
The invention discloses early-strength low-calcium Portland cement and a preparation method thereof. The early-strength low-calcium Portland cement comprises a clinker mixture composed of 95 wt% of minerals and 5 wt% of dihydrate gypsum, and the minerals comprise, by mass, 30%-40% of C3S, 10%-20% of C2S, 15%-25% of C3A and 15%-30% of C4AF; limestone is also included, and the mixing amount of the limestone accounts for 6-15% of the total mass of the clinker mixture. The preparation method comprises the following steps: (1) weighing limestone, fly ash, clay, shale and iron powder as mineral rawmaterials according to the mineral composition, calcining to obtain minerals, and adding dihydrate gypsum to obtain a clinker mixture; and (2) externally doping limestone into the obtained clinker mixture, and grinding to obtain the early-strength low-calcium Portland cement. The early-strength low-calcium Portland cement has high early-stage and later-stage mechanical strength, and because the content requirement of CaO in the clinker is low and the content requirement of CaCO3 (limestone) in the raw materials is low, the heat consumption generated by CaCO3 decomposition during calcination can be significantly reduced, thereby significantly saving energy.
本发明公开了一种早强低钙型硅酸盐水泥及其制备方法。该早强低钙型硅酸盐水泥包括由95wt％的矿物和5wt％的二水石膏组成的熟料混合料，其中，矿物按质量分数计包括：CS 30～40％、CS 10～20％、CA 15～25％、CAF 15～30％；还包括外掺石灰石，石灰石的掺量为熟料混合料总质量的6～15％。其制备方法为：(1)按照矿物组成称取石灰石、粉煤灰、粘土、页岩和铁粉作为矿物原料，煅烧得到矿物，加入二水石膏，得到熟料混合料；(2)在所得熟料混合料中外掺石灰石，粉磨，即得早强低钙型硅酸盐水泥。本发明的早强低钙型硅酸盐水泥早期、后期力学强度均高，而且，由于熟料中CaO含量要求低，对原料中CaCO(石灰石)含量要求低，这可显著降低煅烧时CaCO分解产生的热耗，从而显著节能。
Early-strength low-calcium Portland cement and preparation method thereof
一种早强低钙型硅酸盐水泥及其制备方法
HOU GUIHUA (Autor:in) / LIU LI (Autor:in) / CUI ENTIAN (Autor:in) / YANG XIULI (Autor:in) / YAN ZIWEI (Autor:in) / LU BAO (Autor:in) / SUN JINFENG (Autor:in)
08.09.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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