在“两山”理论、“双碳”目标的新形势下,我国发布了一系列政策及优惠条件鼓励以工业副产石膏为原料制备石膏胶凝材料,包括建筑石膏、α型高强石膏、混合相石膏等。迄今为止,国内鲜有关于石膏胶凝材料的碳足迹核算报告。本文基于生命...在“两山”理论、“双碳”目标的新形势下,我国发布了一系列政策及优惠条件鼓励以工业副产石膏为原料制备石膏胶凝材料,包括建筑石膏、α型高强石膏、混合相石膏等。迄今为止,国内鲜有关于石膏胶凝材料的碳足迹核算报告。本文基于生命周期评价方法,针对工业副产石膏制备石膏胶凝材料建立碳足迹核算模型,并以磷石膏制备α型高强石膏为例进行验证。结果表明,α型高强石膏产品原料获取、生产、运输三个阶段的碳足迹分别为3.95、288.04、14.31 kg CO_(2) eq/t,总量为306.3 kg CO_(2) eq/t,其中生产阶段碳排放量最大,是降低能耗、减少碳排放、节约成本的重要环节。本文建立的碳足迹核算模型适用于建筑石膏、α型高强石膏、无水石膏、混合相石膏等产品碳足迹核算。展开更多
This paper investigates the impact of flue gas desulfurization(FGD)gypsum's crystal modifier on the characteristics and microcosmic mechanism ofα-high strength gypsum.The results demonstrate that all three crysta...This paper investigates the impact of flue gas desulfurization(FGD)gypsum's crystal modifier on the characteristics and microcosmic mechanism ofα-high strength gypsum.The results demonstrate that all three crystal modifiers can convert FGD gypsum toα-high-strength gypsum.Citric acid(CA)has the most significant influence onα-high-strength gypsum,and the preparedα-high-strength gypsum is short columnar,with an aspect ratio in the range of 1-3,and has a faster setting time,a larger specific surface area,and a smaller standard consistency,higher compressive strength,greater surface hardness,and smaller crystal particle size.The initial setting time of theα-high-strength gypsum manufactured with CA crystal modifier was decreased by 36%compared to the blank sample,the final setting time was lowered by 37.5%,and the water consumption of the standard consistency was reduced by 8%.The maximum strength is 32 MPa after 2 h,the absolute dry compressive strength is up to 38 MPa,and the surface hardness is improved by 24.43%.展开更多
文摘在“两山”理论、“双碳”目标的新形势下,我国发布了一系列政策及优惠条件鼓励以工业副产石膏为原料制备石膏胶凝材料,包括建筑石膏、α型高强石膏、混合相石膏等。迄今为止,国内鲜有关于石膏胶凝材料的碳足迹核算报告。本文基于生命周期评价方法,针对工业副产石膏制备石膏胶凝材料建立碳足迹核算模型,并以磷石膏制备α型高强石膏为例进行验证。结果表明,α型高强石膏产品原料获取、生产、运输三个阶段的碳足迹分别为3.95、288.04、14.31 kg CO_(2) eq/t,总量为306.3 kg CO_(2) eq/t,其中生产阶段碳排放量最大,是降低能耗、减少碳排放、节约成本的重要环节。本文建立的碳足迹核算模型适用于建筑石膏、α型高强石膏、无水石膏、混合相石膏等产品碳足迹核算。
文摘This paper investigates the impact of flue gas desulfurization(FGD)gypsum's crystal modifier on the characteristics and microcosmic mechanism ofα-high strength gypsum.The results demonstrate that all three crystal modifiers can convert FGD gypsum toα-high-strength gypsum.Citric acid(CA)has the most significant influence onα-high-strength gypsum,and the preparedα-high-strength gypsum is short columnar,with an aspect ratio in the range of 1-3,and has a faster setting time,a larger specific surface area,and a smaller standard consistency,higher compressive strength,greater surface hardness,and smaller crystal particle size.The initial setting time of theα-high-strength gypsum manufactured with CA crystal modifier was decreased by 36%compared to the blank sample,the final setting time was lowered by 37.5%,and the water consumption of the standard consistency was reduced by 8%.The maximum strength is 32 MPa after 2 h,the absolute dry compressive strength is up to 38 MPa,and the surface hardness is improved by 24.43%.