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孟文慧，宋少民

（北京建筑大學 建筑結構與環境修復功能材料北京市重點實驗室，北京 100044）

摘 要：以礦渣、粉煤灰、鋼渣、鐵尾礦微粉、熟石灰、脫硫石膏等為原材料研究無熟料膠凝材料的制備及其膠砂、混凝土性能。結果表明：無熟料膠凝材料標準稠度用水量在28.5%到30.5%之間，初凝時間均大于150 min，終凝時間在200~460 min之間；不摻加水泥的無熟料膠凝材料，早期鋼渣含量較高的通用膠砂抗壓強度較高，其專用膠砂抗壓強度也較高且56 d時可達50 MPa；摻入不超過膠凝材料5%的P?Ⅰ型硅酸鹽水泥的無熟料膠凝材料，鋼渣含量較低、石膏含量較高的通用和專用膠砂抗壓強度都相對較高，較優組別專用膠砂抗壓強度28 d可達35 MPa，56 d達到45 MPa；選用膠砂強度較優的膠凝材料配比進行混凝土試驗，無熟料膠凝材料混凝土工作性良好，28 d抗壓強度滿足C20~C25混凝土強度要求，56 d滿足C25~C30混凝土強度要求。

關鍵詞：無熟料膠凝材料；膠砂；混凝土；工作性；強度

中圖分類號：TU528  

文獻標志碼：A   

文章編號：1005-8249（2024）01-0032-07

DOI：10.19860/j.cnki.issn1005-8249.2024.01.007

 

MENG Wenhui, SONG Shaomin

(Beijing University of Civil Engineering and Architecture, Beijing Key Laboratory of Building Structure and Environmental Remediation Functional Materials, Beijing 100044, China)

Abstract: Slag, fly ash, steel slag, iron tailings powder, slaked lime, desulfurization gypsum, etc.，are applied as raw materials to study the preparation of non clinker cementitious materials and the properties of mortar and concrete. The experimental results indicate that the standard consistency water consumption of non clinker cementitious materials is between 28.5% and 30.5%, and the initial setting time is greater than 150 min, while the final setting time ranges from 200 min to 460 min; The type I non clinker cementitious material without adding cement is used. The general mortar with high steel slag content has a higher early compressive strength, and its special mortar also has a higher compressive strength that can reach 50 MPa at 56 d; P ? I type Portland cement with no more than 5% cementitious materials is a Class II non clinker cementitious material. The compressive strength of general and specialized cementitious sand with low steel slag content and high gypsum content is relatively high. The compressive strength of the superior group's special mortar can reach 35 MPa after 28 d and 45 MPa after 56 d; The concrete test was conducted using a cementitious material ratio with better mortar strength. The concrete without clinker cementitious material showed good workability, and the compressive strength at 28 d met the strength requirements of C20-C25 concrete, while the compressive strength at 56 days met the strength requirements of C25-C30 concrete.

Keywords: clinker-free cementitious materials; mortar; concrete; workability; strength

作者簡介：孟文慧(1997-),女,本科,主要研究方向：建筑材料。

通信作者：宋少民(1965-),男,碩士，教授,主要研究方向：現代混凝土材料。

收稿日期：2023-08-24