外掺料对磷石膏基胶凝材料力学及导热性能的影响
收稿日期: 2021-12-01
网络出版日期: 2022-09-22
基金资助
国家自然科学基金(51968009);基于5G和“机器视觉”技术的智能机器人在隧道监测中的应用技术研究与示范（黔科合支撑[2021]一般523）;基于机器视觉的工程安全监测技术研究与应用(黔科中引地[2021]4023);建筑工程结构全寿命周期健康监测技术研究(科筑合同[2021]43-20);贵州大学实验室开放项目(SYSKF2022-091)
Effect of external admixtures on mechanical and thermal conductivity of phosphogypsum composite cementitious materials
Received date: 2021-12-01
Online published: 2022-09-22
将磷石膏应用于建筑业，可以解决磷化工副产物堆积的问题。采用单因素实验，通过改变水灰质量比、粉煤灰掺量、生石灰掺量等条件来研究各因素对磷石膏基胶凝材料力学性能及保温性能的影响，借助X射线衍射（XRD）、X射线荧光光谱（XRF）、扫描电镜（SEM）等手段来分析磷石膏基胶凝材料的物化性质和形貌结构。结果表明，磷石膏基胶凝材料的导热系数和抗压强度都与水灰质量比呈负相关，在水灰质量比为0.250时胶凝材料的抗压强度最大、水灰质量比为0.550时胶凝材料的导热系数最小；粉煤灰在磷石膏基胶凝体系中除了提供胶凝性能外，还会被生石灰激发出活性，增强胶凝体系的综合性能，粉煤灰掺量为50%（质量分数）时胶凝体系的综合性能最佳；生石灰在磷石膏基胶凝体系中对杂质的吸附效果明显，生石灰掺量超过7%（质量分数）以后对胶凝体系的保温性能和力学性能的增强效果明显。
陈明胜 , 刘鹏 , 孔德文 , 李元 , 于可 , 黄彦森 , 武宁波 , 常娟娟 . 外掺料对磷石膏基胶凝材料力学及导热性能的影响[J]. 无机盐工业, 2022 , 54(9) : 113 -118 . DOI: 10.19964/j.issn.1006-4990.2021-0725
Application of phosphogypsum in construction industry can solve the problem of accumulation of phosphorus chemical by?products.Single factor experiment was used to study the effects of various factors on the mechanical properties and thermal insulation properties of phosphogypsum?based cementitious materials by changing the water?cement mass ratio，the content of fly ash and the content of quicklime.The physicochemical properties and morphology of phosphogypsum-based cementitious materials were analyzed by means of X-ray diffraction（XRD），X-ray fluorescence spectroscopy（XRF） and scanning electron microscopy（SEM）.The results showed that the thermal conductivity and compressive strength of phosphogypsum?based cementitious materials were negatively correlated with the water?cement mass ratio.When the water cement ratio was 0.250，the compressive strength of the cementitious material was the largest，and the thermal conductivity of the cementitious material was the smallest when the water?cement mass ratio was 0.550.Fly ash in phosphogypsum?based cementitious system not only provided cementitious performance，but also was activated by quicklime to enhance the comprehensive performance of the cementitious system.When the content of fly ash was 50%（mass fraction），the comprehensive performance of the cementitious system was the best.The adsorption effect of lime on impurities in phosphogypsum-based cementitious system was obvious.When the content of lime was more than 7%（mass fraction），the thermal insulation performance and mechanical properties of the cementitious system were obviously enhanced.
| [1] | BELBOOM S， SZ?CS C， LéONARD A.Environmental impacts of phosphoric acid production using di-hemihydrate process:A Belgian case study[J].Journal of Cleaner Production，2015，108:978-986. |
| [2] | OUAKARROUCH M， AZHARY K EL， LAAROUSSI N， et al.Thermal performances and environmental analysis of a new composite building material based on gypsum plaster and chicken feat?hers waste[J].Thermal Science and Engineering Progress，2020，19.Doi:10.1016/j.tsep.2020.100642. |
| [3] | TIAN Tian， YAN Yun， HU Zhihua， et al.Utilization of original phosphogypsum for the preparation of foam concrete[J].Construction and Building Materials，2016，115:143-152. |
| [4] | 尹明干，汪晖，石飞停.改性磷石膏的强度与孔结构的研究[J].材料导报，2018，32（S2）:526-529. |
| [4] | YIN Minggan， WANG Hui， SHI Feiting.Mechanical strength and pore structure analysis of modified phosphogypsum[J].Materials Review，2018，32（S2）:526-529. |
| [5] | 兰文涛，吴爱祥，王贻明，等.基于正交试验的半水磷石膏充填配比优化[J].中国有色金属学报，2019，29（5）:1083-1091. |
| [5] | LAN Wentao， WU Aixiang， WANG Yiming， et al.Optimization of filling ratio of hemihydrate phosphogypsum based on orthogonal test[J].The Chinese Journal of Nonferrous Metals，2019，29（5）:1083-1091. |
| [6] | 李紫瑞，邢冬娴，汤建伟，等.磷石膏基复合相变材料的制备及储热性能研究[J].无机盐工业，2022，54（4）:34-39. |
| [6] | LI Zirui， XING Dongxian， TANG Jianwei， et al.Study on preparation and heat storage performance of phosphogypsum?based composite phase change materials[J].Inorganic Chemicals Industry，2022，54（4）:34-39. |
| [7] | 罗双，付汝宾，孔德文，等.掺合料对磷石膏基复合胶凝材料耐水性及强度的影响综述[J].无机盐工业，2020，52（11）:6-11. |
| [7] | LUO Shuang， FU Rubin， KONG Dewen， et al.Summary on effects of admixtures on water resistance and strength of phosphogypsum-based composite cementitious materials[J].Inorganic Chemicals Industry，2020，52（11）:6-11. |
| [8] | 王水连，辛贤.中国甘蔗种植机械与劳动力的替代弹性及其对农民收入的影响[J].农业技术经济，2017（12）:32-46. |
| [9] | 兰文涛，吴爱祥，王贻明，等.半水磷石膏充填体离子固化与尺寸效应[J].中国环境科学，2019，39（1）:210-218. |
| [9] | LAN Wentao， WU Aixiang， WANG Yiming， et al.Ionic solidification and size effect of hemihydrate phosphogypsum backfill[J].China Environmental Science，2019，39（1）:210-218. |
| [10] | MA Weiping， LIU Chunling， BROWN P W， et al.Pore structures of fly ashes activated by Ca（OH）2 and CaSO4·2H2O[J].Cement and Concrete Research，1995，25（2）:417-425. |
| [11] | POTGIETER J H， POTGIETER S S， MCCRINDLE R I.A comparison of the performance of various synthetic gypsums in plant trials during the manufacturing of OPC clinker[J].Cement and Concrete Research，2004，34（12）:2245-2250. |
| [12] | JIANG Guanzhao， WU Aixiang， WANG Yiming， et al.Low cost and high efficiency utilization of hemihydrate phosphogypsum:Used as binder to prepare filling material[J].Construction and Building Materials，2018，167:263-270. |
| [13] | 苏英，邱慧琼，贺行洋，等.弱碱激发超细粉煤灰水化产物结构分析[J].材料导报，2019，33（14）:2376-2380. |
| [13] | SU Ying， QIU Huiqiong， HE Xingyang， et al.Structure analysis on hydration products of ultra-fine fly ash activated by weak alkali[J].Materials Reports，2019，33（14）:2376-2380. |
| [14] | 姜关照，吴爱祥，李红，等.含硫尾砂充填体长期强度性能及其影响因素[J].中南大学学报:自然科学版，2018，49（6）:1504-1510. |
| [14] | JIANG Guanzhao， WU Aixiang， LI Hong， et al.Long?term strength performance of sulfur tailings filling and its affecting factors[J].Journal of Central South University:Science and Technology，2018，49（6）:1504-1510. |
/
| 〈 |
|
〉 |
