EFFECTS OF VARIOUS GRINDING AIDS DOSAGE ON COMMINUTION EFFICIENCY AND CEMENT CHARACTERISTICS

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-01-01 DOI:10.17794/rgn.2023.1.7

H. H. Gharehgheshlagh, Sajjad Chehreghani, Behnam Seyyedi

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Abstract

Grinding aids are materials that are added to cement mixtures to improve the characteristics of the cement or increase the efficiency of the milling systems or both in the clinker grinding (finish grinding) stage. In this study, the effects of four grinding aids (Triisopropanolamine based (TIPA), Triethanolamine based (TEA), Hydroxylamine based (HA), and Calcium nitrate based (CN) grinding aids) in the clinker grinding process were evaluated on the essential characteristics of the produced cement: namely specific surface area (Blaine number), compressive strength of concrete, and the comminution efficiency-retention time (energy saving) at four different dosage levels. In the first step, the grinding time required to reach the Blaine number of the investigated Cement type (S-OPC: Studied Ordinary Portland Cement) was obtained as 69.75 minutes by kinetic grinding tests. Afterward, 17 laboratory-scale grinding tests were performed utilizing S-OPC cement and four grinding aids at four different doses of 0.02%, 0.05%, 0.08% and 0.11 %. The results indicated that the TIPA-0.11 (Triisopropylamine compound at a dosage level of 0.11%), with a Blaine value of 4069 cm2/g, and grinding efficiency of 19%, had the most significant effect on the fineness and comminution efficiency. Furthermore, the concrete samples produced from all the grinding aids were tested for their compressive strength at 2, 7, and 28 days. The results showed that compared to control samples, the highest growth of compressive strength were on day 2 and 7 for TIPA-0.11 samples with values of 37.08% and 32.44%, respectively. Meanwhile, the highest increase of compressive strength was after 28 days for TIPA-0.11 samples with a 22.14% increase.

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不同助磨剂用量对水泥粉碎效率和特性的影响

助磨剂是在熟料研磨(精磨)阶段添加到水泥混合物中以改善水泥特性或提高磨粉系统效率或两者兼而有之的材料。本研究对四种助磨剂(三异丙醇胺基(TIPA)、三乙醇胺基(TEA)、羟胺基(HA)和硝酸钙基(CN)助磨剂)在熟料研磨过程中的作用进行了评价，考察了四种不同掺量水平下水泥的基本特性:比表面积(Blaine数)、混凝土抗压强度和粉碎效率-保持时间(节能)。第一步，通过动力磨矿试验得到所研究水泥类型(S-OPC:研究普通硅酸盐水泥)达到Blaine数所需的磨矿时间为69.75 min。随后，以0.02%、0.05%、0.08%和0.11% 4种不同剂量的S-OPC水泥和4种助磨剂进行了17次实验室规模的研磨试验。结果表明，TIPA-0.11(三异丙胺化合物，用量为0.11%)，Blaine值为4069 cm2/g，粉碎效率为19%，对细度和粉碎效率的影响最为显著。此外，测试了由所有助磨剂制成的混凝土样品在2、7和28天的抗压强度。结果表明:与对照试样相比，TIPA-0.11试样抗压强度在第2天和第7天的增幅最大，分别为37.08%和32.44%;TIPA-0.11的抗压强度在28 d后增幅最大，达到22.14%。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.