Abstract: High belite calcium sulphoaluminate cement (HBCSA) is a newly developed cementing material with broad application prospects for its excellent mechanical properties, high volume stability, good durability and anti efflorescence property. Howe-ver, it is difficult for common retarders to delay its rapid hydration effectively due to the rapid setting and hardening of HBCSA, which has become the bottleneck restricting the wide application of this kind of new cement. In order to control the setting time of HBCSA and extend its application scope, the retarding material suited for HBCSA was explored and discussed in this paper, and the mechanism of hydration hardening of HBCSA was revealed, as well as the effective control measures were put forward. It was found that the combination of polycarboxylate superplasticizer (PCE) and β-cyclodextrin(β-CD) had good retarding effect to HBCSA paste or mortar. The fluidity, setting time and strength of HBCSA mortar with the admixture were tested. Scanning electron microscope (SEM), X-ray diffraction (XRD) analyzer, total organic carbon (TOC) analyzer and hydration heat evolution of cement were carried out. The results showed that the adding of PCE and β-CD could slow down the crystallization rate of ettringite, the setting time of HBCSA cement paste was significantly prolonged, and the cement setting time was increased with the increment of retarder content. Adding PCE and β-CD had a positive effect on improving the fluidity of HBCSA and the strength of rubber in the middle and late stages.
唐芮枫, 王子明, 何欢, 张琳, 蔡扬扬, 王杰. 聚羧酸系减水剂复配β-环糊精对高贝利特硫铝酸盐水泥性能的影响[J]. 材料导报, 2018, 32(22): 4000-4005.
TANG Ruifeng, WANG Ziming, HE Huan, ZHANG Lin, CAI Yangyang, WANG Jie. Effects of Polycarboxylate Superplasticizer with β-Cyclodextrin on Properties of High Belite Calcium Sulphoaluminate Cement. Materials Reports, 2018, 32(22): 4000-4005.
1 Gartner E. Industrially interesting approaches to “low-CO2” cements[J]. Cement and Concrete Research,2004,34(9):1489. 2 Damtoft J S, Lukasik J, Herfort D, et al. Sustainable development and climate change initiatives[J]. Cement and Concrete Research,2008,38(2):115. 3 Winnefeld F, Lothenbach B. Hydration of calcium sulfoaluminate cements-experimental findings and thermodynamic modeling[J]. Cement and Concrete Research,2010,40(8):1239. 4 Lan M Z, Xiang B F, Zhou J, et al. Hydration mechanism of rapid setting and hardening high belite calcium sulfoaluminate cement[J]. Bulletin of the Chinese Ceram Society,2017,36(8):2720(in Chinese). 兰明章,项斌峰,周健,等.快凝快硬高贝利特硫铝酸盐水泥熟料水化机理研究[J].硅酸盐通报,2017,36(8):2720. 5 Chen I A, Hargis C W, Juenger M C G. Understanding expansion in calcium sulfoaluminate-belite cements[J]. Cement and Concrete Research,2012,42(1):51. 6 Chen I A, Juenger M C G. Incorporation of coal combustion resi-duals into calcium sulfoaluminate-belite cement clinkers[J]. Cement and Concrete Composites,2012,34(8):893. 7 Valenti G L, Marroccoli M, Pace M L, et al. Discussion of the paper “Understanding expansion in calcium sulfoaluminate-belite cements” by I.A. Chen et al., Cem. Concr Res,42(2012) 51-60[J]. Cement and Concrete Research,2012,42(11):1555. 8 Ferraris C F, Obla K H, Hill R. The influence of mineral admixtures on the rheology of cement paste and concrete[J]. Cement and Concrete Research,2001,31(2):245. 9 Shi X, Yang Z, Liu Y, et al. Strength and corrosion properties of Portland cement mortar and concrete with mineral admixtures[J]. Construction and Building Materials,2011,25(8):3245. 10 Lummer N R, Plank J. Combination of lignosulfonate and AMPSR-co-NNDMA water retention agent—An example for dual synergistic interaction between admixtures in cement[J]. Cement and Concrete Research,2012,42(5):728. 11 Li G, He T, Hu D, et al. Effects of retarders on the fluidity of pastes containing β-naphthalenesulfonic acid-based superplasticiser[J]. Advances in Cement Research,2012,24(4):203. 12 Plank J, Winter C. Competitive adsorption between superplasticizer and retarder molecules on mineral binder surface[J]. Cement and Concrete Research,2008,38(5):599. 13 Li G, He T, Hu D, et al. Effects of two retarders on the fluidity of pastes plasticized with aminosulfonic acid-based superplasticizers[J]. Construction and Building Materials,2012,26(1):72. 14 Wu Y H, He T S, Shen F Q, et al. Study on the synergistic retarding effects of the compounding of superplasticizer with retarders[J]. Concrete,2008(6):47(in Chinese). 伍勇华,何廷树,申富强,等.高效减水剂与缓凝剂复合使用的协同缓凝效应研究[J].混凝土,2008(6):47. 15 Tan H, Zou F, Ma B, et al. Effect of competitive adsorption between sodium gluconate and polycarboxylate superplasticizer on rheology of cement paste[J]. Construction and Building Materials,2017,144(14):338. 16 Cheung J, Jeknavorian A, Roberts L, et al. Impact of admixtures on the hydration kinetics of Portland cement[J]. Cement and Concrete Research,2011,41(12):1289. 17 Wang Z J, He T S. Function mechanism of retarding agent and its influences on properties of cement concrete[J]. Highway,2006(7):149(in Chinese). 王振军,何廷树.缓凝剂作用机理及对水泥混凝土性能影响[J].公路,2006(7):149. 18 Lesage K, Cizer , Desmet B, et al. Plasticising mechanism of so-dium gluconate combined with PCE[J]. Advances in Cement Research,2015,27(3):163. 19 Bey H B, Hot J, Baumann R, et al. Consequences of competitive adsorption between polymers on the rheological behaviour of cement pastes[J]. Cement & Concrete Composites,2014,54:17. 20 Zhou Y, Xu W L, Li X R, et al. Influence of citric acid on setting time and hydration of alite calcium sulfoaluminate cement[J]. Concrete,2014(12):76(in Chinese). 周妍,许文龙,黎学润,等.柠檬酸对阿利特-硫铝酸盐水泥凝结时间及水化过程的影响[J].混凝土,2014(12):76. 21 Ba M F, Liang X Q, Lu M J, et al. Effect of composite coagulator on sulphoaluminate cement and the corresponding mechanism[J]. Materials Review B: Research Papers,2015,29(5):133(in Chinese). 巴明芳,梁新奇,卢梦洁,等.复合调凝组分对硫铝酸盐水泥性能的影响及机理[J].材料导报:研究篇,2015,29(5):133. 22 沈威.水泥工艺学[M].武汉:武汉工业大学出版社,1991:172.
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2018, Vol. 32 
