改性脱硫石膏基混凝土物理力学性能试验研究
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摘要
为了验证改性脱硫石膏替代水泥的可行性,采用实验方法,对改性脱硫石膏和水泥及其混凝土的物理力学性能进行了对比试验研究。结果表明:改性脱硫石膏基混凝土抗压强度达到44 MPa,抗折强度达到9.5 MPa,明显高于水泥基混凝土。抗拉强度、抗剪强度与水泥基混凝土较为接近;因此,改性脱硫石膏替代水泥作为胶凝材料是可行的。养护条件的差异会对混凝土强度增长产生影响,低湿度的常温养护条件更适宜改性脱硫石膏基混凝土后期强度的发展;所以在煤矿巷道的喷射混凝土支护施工后无需洒水养护,从而减少施工工序,提高施工效率。另外,还给出了改性脱硫石膏基喷射混凝土配合比的三种优化方案,在满足其施工所需强度的条件下能够方便灵活地选用其最优配合比。
In order to verify the feasibility of replacing cement with modified desulphurization gypsum,the experimental method was used to study the physical and mechanical properties of the modified desulfurization gypsum and cement and its concrete was carried out. The results show that the compressive strength of the modified desulphurization gypsum-based concrete is 44 MPa,the flexural strength reaches 9. 5 MPa,which is higher than that of cement-based concrete,and the tensile strength and shear strength are close to that of cement-based concrete,so it is feasible to replace cement as cementitious material. The difference of curing condition will influence the growth of concrete strength,and the curing condition of low humidity is more suitable for the development of the later strength of the modified desulfurization gypsum-based concrete. Therefore,in the coal mine tunnel shotcrete support construction need not sprinkle the water maintenance,thus reduces the construction procedure,enhances the construction efficiency. In addition,three optimization schemes about the proportion of mixture of modified desulfurization gypsum-based shotcrete are given,and the optimal proportion of mixture can be selected flexibly and conveniently under the condition of the required strength of the construction.
In order to verify the feasibility of replacing cement with modified desulphurization gypsum,the experimental method was used to study the physical and mechanical properties of the modified desulfurization gypsum and cement and its concrete was carried out. The results show that the compressive strength of the modified desulphurization gypsum-based concrete is 44 MPa,the flexural strength reaches 9. 5 MPa,which is higher than that of cement-based concrete,and the tensile strength and shear strength are close to that of cement-based concrete,so it is feasible to replace cement as cementitious material. The difference of curing condition will influence the growth of concrete strength,and the curing condition of low humidity is more suitable for the development of the later strength of the modified desulfurization gypsum-based concrete. Therefore,in the coal mine tunnel shotcrete support construction need not sprinkle the water maintenance,thus reduces the construction procedure,enhances the construction efficiency. In addition,three optimization schemes about the proportion of mixture of modified desulfurization gypsum-based shotcrete are given,and the optimal proportion of mixture can be selected flexibly and conveniently under the condition of the required strength of the construction.
引文
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3章红梅.玻璃纤维增强石膏预制空心墙体的试验研究.建筑结构,2007;37(7):107-109Zhang Hongmei.Experimental research on glass fiber reinforced plasterboard.Building Structure,2007;37(7):107-109
4廖永进,余岳溪,张瑞,等.湿法脱硫系统中应用水汽相变促进SO3酸雾脱除研究.高校化学工程学报,2017;31(4):970-976Liao Yongjin,Yu Yuexi,Zhang Rui,et al.Removal of sulfuric acid mist in limestone gypsum desulfurization processes via supersaturation vapor phase transition.Journal of Chemical Engineering of Chinese Universities,2017;31(4):970-976
5张翔,何廷树,何娟.硅酸盐水泥-粉煤灰-脱硫石膏复合材料的性能研究.硅酸盐通报,2014;33(4):796-799Zhang Xiang,He Tingshu,He Juan.Study on the properties of portland cement-fly ash-desulfurization gypsum composites.Bulletin of The Chinese Ceramic Society,2014;33(4):796-799
6王云浩.脱硫石膏基复合材料的耐水性能研究.郑州:郑州大学,2013Wang Yunhao.Research on water resistance of FGD gypsum-based composite materials.Zhengzhou:Zhengzhou University,2013
7李丽君,张强,刘平,等.火电厂烟气脱硫石膏重金属含量监测与分析.水土保持学报,2015;29(2):209-214Li Lijun,Zhang Qiang,Liu Ping,et al.Survey and analysis of heavy metals in FGD gypsum from coal-fired power pants.Journal of Soil and Water Conservation,2015;29(2):209-214
8谭平,刘家祥,张正文.脱硫石膏配制胶结材和混凝土的研究.矿产综合利用,2008;(5):43-46Tan Ping,Liu Jiaxiang,Zhang Zhengwen.The research on preparation of binding material and concrete with desulphurization gypsum.Multipurpose Utilization of Mineral Resources,2008;(5):43-46
9荣隽锋,郑腾龙.基于不同养护条件的改性脱硫石膏材料抗压强度试验研究.安徽建筑大学学报,2014;(6):58-61Rong Junfeng,Zheng Tenglong.A study on conperhensive strength of modified desulfurization gypsum mortar under different curing conditions.Journal of Anhui Jianzhu University,2014;(6):58-61
10施惠生,郭晓潞,刘红岩.脱硫石膏对矿渣混凝土抗渗透性能的影响.同济大学学报(自然科学版),2009;37(5):656-659Shi Huisheng,Guo Xiaolu,Liu Hongyan.Influence of flue gas desulphurization gypsum on resistance of permeability of slag concrete.Journal of Tongji University(Natural Science),2009;37(5):656-659
11谭平,王海云.脱硫石膏掺量对混凝土性能的影响.矿产综合利用,2010;(1):46-48Tan Ping,Wang Haiyun.The influence of dosage of the desulphurized gypsum on concrete function.Multipurpose Utilization of Mineral Resources,2010;(1):46-48
12李冠豪.改性脱硫石膏基混凝土力学特性试验研究.淮南:安徽理工大学,2014Li Guanhao.Mechanical properties of the modified experimental study gypsum concrete.Huainan:Anhui University of Science and Technology,2014
2毛树标.烟气脱硫石膏综合利用分析.杭州:浙江大学,2005Mao Shubiao.Comprehensive utilization analysis of flue gas desulfurization gypsum.Hangzhou:Zhejiang University,2013
3章红梅.玻璃纤维增强石膏预制空心墙体的试验研究.建筑结构,2007;37(7):107-109Zhang Hongmei.Experimental research on glass fiber reinforced plasterboard.Building Structure,2007;37(7):107-109
4廖永进,余岳溪,张瑞,等.湿法脱硫系统中应用水汽相变促进SO3酸雾脱除研究.高校化学工程学报,2017;31(4):970-976Liao Yongjin,Yu Yuexi,Zhang Rui,et al.Removal of sulfuric acid mist in limestone gypsum desulfurization processes via supersaturation vapor phase transition.Journal of Chemical Engineering of Chinese Universities,2017;31(4):970-976
5张翔,何廷树,何娟.硅酸盐水泥-粉煤灰-脱硫石膏复合材料的性能研究.硅酸盐通报,2014;33(4):796-799Zhang Xiang,He Tingshu,He Juan.Study on the properties of portland cement-fly ash-desulfurization gypsum composites.Bulletin of The Chinese Ceramic Society,2014;33(4):796-799
6王云浩.脱硫石膏基复合材料的耐水性能研究.郑州:郑州大学,2013Wang Yunhao.Research on water resistance of FGD gypsum-based composite materials.Zhengzhou:Zhengzhou University,2013
7李丽君,张强,刘平,等.火电厂烟气脱硫石膏重金属含量监测与分析.水土保持学报,2015;29(2):209-214Li Lijun,Zhang Qiang,Liu Ping,et al.Survey and analysis of heavy metals in FGD gypsum from coal-fired power pants.Journal of Soil and Water Conservation,2015;29(2):209-214
8谭平,刘家祥,张正文.脱硫石膏配制胶结材和混凝土的研究.矿产综合利用,2008;(5):43-46Tan Ping,Liu Jiaxiang,Zhang Zhengwen.The research on preparation of binding material and concrete with desulphurization gypsum.Multipurpose Utilization of Mineral Resources,2008;(5):43-46
9荣隽锋,郑腾龙.基于不同养护条件的改性脱硫石膏材料抗压强度试验研究.安徽建筑大学学报,2014;(6):58-61Rong Junfeng,Zheng Tenglong.A study on conperhensive strength of modified desulfurization gypsum mortar under different curing conditions.Journal of Anhui Jianzhu University,2014;(6):58-61
10施惠生,郭晓潞,刘红岩.脱硫石膏对矿渣混凝土抗渗透性能的影响.同济大学学报(自然科学版),2009;37(5):656-659Shi Huisheng,Guo Xiaolu,Liu Hongyan.Influence of flue gas desulphurization gypsum on resistance of permeability of slag concrete.Journal of Tongji University(Natural Science),2009;37(5):656-659
11谭平,王海云.脱硫石膏掺量对混凝土性能的影响.矿产综合利用,2010;(1):46-48Tan Ping,Wang Haiyun.The influence of dosage of the desulphurized gypsum on concrete function.Multipurpose Utilization of Mineral Resources,2010;(1):46-48
12李冠豪.改性脱硫石膏基混凝土力学特性试验研究.淮南:安徽理工大学,2014Li Guanhao.Mechanical properties of the modified experimental study gypsum concrete.Huainan:Anhui University of Science and Technology,2014
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