含掺合料混凝土水化产物体积分数计算及其影响因素
Powers理论仅提出针对纯水泥水化产物体积的计算方法,为研究掺加矿物掺合料后的胶凝材料的水化产物体积的影响,该文基于水泥水化基本原理及矿物掺合料的反应机制,提出含掺合料胶凝材料的水化产物体积的计算公式,并将其应用于计算掺合料为0时凝胶材料水化产物的体积分数,与基于Powers理论模型的计算结果对比来验证该文提出的方法的可靠性,在此基础上,进一步研究水胶比、掺合料种类及其比例对胶凝材料水化产物体积的影响。结果表明：矿物掺合料掺量的降低和水胶比的增加都能促进复合水泥基材料的水化,相对而言,矿物掺合料增量对胶凝材料水化程度的影响较水胶比要大。复合胶凝材料中CSH、铝酸盐相AF和CH的体积分数均低于...
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| Published in | 农业工程学报 Vol. 32; no. 3; pp. 48 - 54 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
新疆农业大学水利与土木工程学院,乌鲁木齐,830052%新疆农业大学草业与环境科学学院,乌鲁木齐,830052
2016
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1002-6819 |
| DOI | 10.11975/j.issn.1002-6819.2016.03.008 |
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| Abstract | Powers理论仅提出针对纯水泥水化产物体积的计算方法,为研究掺加矿物掺合料后的胶凝材料的水化产物体积的影响,该文基于水泥水化基本原理及矿物掺合料的反应机制,提出含掺合料胶凝材料的水化产物体积的计算公式,并将其应用于计算掺合料为0时凝胶材料水化产物的体积分数,与基于Powers理论模型的计算结果对比来验证该文提出的方法的可靠性,在此基础上,进一步研究水胶比、掺合料种类及其比例对胶凝材料水化产物体积的影响。结果表明：矿物掺合料掺量的降低和水胶比的增加都能促进复合水泥基材料的水化,相对而言,矿物掺合料增量对胶凝材料水化程度的影响较水胶比要大。复合胶凝材料中CSH、铝酸盐相AF和CH的体积分数均低于水泥浆体,未水化颗粒和毛细孔的体积均高于水泥浆体。分析发现,未水化颗粒、CSH凝胶和毛细孔的体积分数分别受水胶比×掺量×矿物掺合料种类（60.33%）、水胶比×矿物掺合料种类（91.79%）和水胶比（89.23%）的影响最大,CH和铝酸盐相AF的体积分数受掺量的影响最大,分别为6.17%和16.65%。研究可为锂渣、粉煤灰和钢渣在水泥混合材和混凝土掺合料中的应用提供科学依据,同时达到降低能耗和节约资源的目的。 |
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| AbstractList | TQ172.1+8; Powers理论仅提出针对纯水泥水化产物体积的计算方法，为研究掺加矿物掺合料后的胶凝材料的水化产物体积的影响，该文基于水泥水化基本原理及矿物掺合料的反应机制，提出含掺合料胶凝材料的水化产物体积的计算公式，并将其应用于计算掺合料为0时凝胶材料水化产物的体积分数，与基于Powers理论模型的计算结果对比来验证该文提出的方法的可靠性，在此基础上，进一步研究水胶比、掺合料种类及其比例对胶凝材料水化产物体积的影响。结果表明：矿物掺合料掺量的降低和水胶比的增加都能促进复合水泥基材料的水化，相对而言，矿物掺合料增量对胶凝材料水化程度的影响较水胶比要大。复合胶凝材料中CSH、铝酸盐相AF和CH的体积分数均低于水泥浆体，未水化颗粒和毛细孔的体积均高于水泥浆体。分析发现，未水化颗粒、CSH 凝胶和毛细孔的体积分数分别受水胶比×掺量×矿物掺合料种类（60.33%）、水胶比×矿物掺合料种类（91.79%）和水胶比（89.23%）的影响最大，CH和铝酸盐相AF的体积分数受掺量的影响最大，分别为6.17%和16.65%。研究可为锂渣、粉煤灰和钢渣在水泥混合材和混凝土掺合料中的应用提供科学依据，同时达到降低能耗和节约资源的目的。 Powers理论仅提出针对纯水泥水化产物体积的计算方法,为研究掺加矿物掺合料后的胶凝材料的水化产物体积的影响,该文基于水泥水化基本原理及矿物掺合料的反应机制,提出含掺合料胶凝材料的水化产物体积的计算公式,并将其应用于计算掺合料为0时凝胶材料水化产物的体积分数,与基于Powers理论模型的计算结果对比来验证该文提出的方法的可靠性,在此基础上,进一步研究水胶比、掺合料种类及其比例对胶凝材料水化产物体积的影响。结果表明：矿物掺合料掺量的降低和水胶比的增加都能促进复合水泥基材料的水化,相对而言,矿物掺合料增量对胶凝材料水化程度的影响较水胶比要大。复合胶凝材料中CSH、铝酸盐相AF和CH的体积分数均低于水泥浆体,未水化颗粒和毛细孔的体积均高于水泥浆体。分析发现,未水化颗粒、CSH凝胶和毛细孔的体积分数分别受水胶比×掺量×矿物掺合料种类（60.33%）、水胶比×矿物掺合料种类（91.79%）和水胶比（89.23%）的影响最大,CH和铝酸盐相AF的体积分数受掺量的影响最大,分别为6.17%和16.65%。研究可为锂渣、粉煤灰和钢渣在水泥混合材和混凝土掺合料中的应用提供科学依据,同时达到降低能耗和节约资源的目的。 |
| Abstract_FL | Powers theory proposes calculation method for the pure volume of cement hydration products, which does not apply to calculate the volume of cementitious materials with mineral admixture. The formula of cementitious materials volume was proposed that based on the basic principles of cement and mineral admixture hydration, and the proposed method of reliability was verified by the results of Powers theoretical model and volume fraction of cement hydration products. On this basis, the factor such as water-cement ratio, the ratio of admixture and types was further researched for the volumes of cementitious materials hydration products. Mixture in test were designed 2 water-cement ratio (0.30 and 0.40, respectively), two content (20% and 60%, respectively) of mineral admixture, and 3 kinds of mineral admixture (lithium slag, fly ash and steel slag, respectively), forming paste that was stirred according with the designed ratio in 5 mL centrifuge tube in a blender and curing to 1, 7, 14, 28, 60 and 90 d in curing room (temperature was (20±1)℃, humidity was not less than 95%), and then testing reaction extent of cement and mineral admixture (such as fly ash, steel slag. lithium slag) according with the chemical bound water and HCl dissolution method. The results showed that hydration extent of lithium slag, fly ash and steel slag at 28d decreased by 46.63%, 69.56% and 74.82% (P<0.05) when mineral admixture content varied from 20% to 60% and water-cement ratio was 0.30. Hydration extent of cement at 28 d was increased by 7.25% when water-cement ratio increased from 0.30 to 0.40. When mineral admixture content varied from 20% to 60%, hydration extent of lithium slag, fly ash and steel slag at 28 d increased by 24.14% 18.56%, 17.61% and 8.84%, 12.21%, and 29.37% (P<0.05), respectively. In contrast, the influence of the mineral admixture content was bigger than water-cement ratio for the hydration extent of composite cementitious materials. In different water-cement ratio and the same mineral admixture content, the hydration extent of cement-based materials with lithium slag was maximal, followed by fly ash, steel slag was minimal, and it could be improved when curing period was extended. The calculated volume fractions of composite cementitious material, CSH, aluminates phase AF and CH in composite cementitious material were lower than cement paste, the volume fraction of unhydrated particles and pores were higher than cement slurry. The volume fraction of unhydrated particles, CSH, CH, aluminates phase AF and pores in lithium slag-cement based was 36.64%, 37.01%, 9.48%, 17.45% and 8.68%, respectively. The volume fraction of unhydrated particles, CSH, CH, aluminates phase AF and pores of fly ash and steel slag-cement based was 100.93%, 91.49%, 101.79%, 102.81%, 131.80% and 97.59%, 91.38%, 106.33%, 97.71%, 170.16% that of lithium slag-cement based. The volume of the pores and CSH gel increased because of the secondary reactions between CH in cement and SiO2 and Al2O3 in mineral admixture when lithium slag, fly ash and slag were incorporated. But the volume fraction of CSH in cement-lithium slag slurry and the volume fraction of AF in cement- fly ash slurry were larger than others, even if the water-cement ratio was from 0.30 to 0.40. Mineral admixtures was different because of chemical composition of mineral admixtures, pozzolanic activity, particle morphology and origin and processing techniques was different, therefore, the volume fraction of unhydrated particles, pores, CSH, CH and aluminates phase were affected by water-cement ratio with content and admixture species, water-cement ratio, water-cement ratio and admixture species and content, respectively. On the whole, the performance of cement-lithium slag slurry was the best, followed by cement-fly ash slurry, and cement-steel slag was the minimum. This study can provide valuble information for lithium slag, fly ash and steel slag to use in cement and concrete, and to reduce energy consumption and conserve resources. |
| Author | 吴福飞 董双快 宫经伟 陈亮亮 李东生 侍克斌 |
| AuthorAffiliation | 新疆农业大学水利与土木工程学院,乌鲁木齐830052 新疆农业大学草业与环境科学学院,乌鲁木齐830052 |
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| Author_FL | Wu Fufei Shi Kebin Chen Liangliang Dong Shuangkuai Li Dongsheng Gong Jingwei |
| Author_FL_xml | – sequence: 1 fullname: Wu Fufei – sequence: 2 fullname: Dong Shuangkuai – sequence: 3 fullname: Gong Jingwei – sequence: 4 fullname: Chen Liangliang – sequence: 5 fullname: Li Dongsheng – sequence: 6 fullname: Shi Kebin |
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| Keywords | minerals cements 矿物 admixture 体积分数 掺合料 水化程度 胶凝材料 cementitious material volume fraction 水化产物 hydration extent hydration products 水泥 |
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| Notes | 11-2047/S Wu Fufei, Dong Shuangkuai, Gong Jingwei, Chen Liangliang, Li Dongsheng, Shi Kebin （1. College of Civil and Hydraulic Engineering, Xinjiang Agricultural University, Urumqi 830052, China; 2. College of Pratacultural and Environmental Sciences, Xinjiang Agricultural University, Urumqi 830052, China） Powers theory proposes calculation method for the pure volume of cement hydration products, which does not apply to calculate the volume of cementitious materials with mineral admixture. The formula of cementitious materials volume was proposed that based on the basic principles of cement and mineral admixture hydration, and the proposed method of reliability was verified by the results of Powers theoretical model and volume fraction of cement hydration products. On this basis, the factor such as water-cement ratio, the ratio of admixture and types was further researched for the volumes of cementitious materials hydration products. Mixture in test were designed 2 water-cement ratio （0.30 and 0.40, respectivel |
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| Publisher | 新疆农业大学水利与土木工程学院,乌鲁木齐,830052%新疆农业大学草业与环境科学学院,乌鲁木齐,830052 |
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| SubjectTerms | 体积分数 掺合料 水化产物 水化程度 水泥 矿物 胶凝材料 |
| Title | 含掺合料混凝土水化产物体积分数计算及其影响因素 |
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