王春, 张翼飞, 朱明礼,等.新型氟石膏基充填材料性能及水化机理研究[J].河南理工大学学报（自然科学版）,doi:10.16186/j.cnki.1673-9787.2023080046.

WANG C, ZHANG Y F, ZHU M L, et al.Study on properties and hydration mechanism of new fluorine gypsum-basedfilling material[J].Journal of Henan Polytechnic University(Natural Science) ,doi:10.16186/j.cnki.1673-9787.2023080046.

新型氟石膏基充填材料性能及水化机理研究(网络首发)

王春1,2, 张翼飞1, 朱明礼1, 任雨蒙1, 展帅菲1

1.河南理工大学 能源科学与工程学院，河南 焦作  454000;2.煤炭安全生产与清洁高效利用省部共建协同创新中心，河南 焦作  454000

摘要:针对水泥基矿山充填材料成本高的问题，用氟石膏和粉煤灰替代水泥作为胶凝材料，通过正交实 验法确定氟石膏基充填材料的最优配比，并对其力学特性、水化产物、水化作用机理及微观结构进行研 究。结合回归分析和正交实验结果，最优配比材料充填体1，7 ，28 d强度可以达到1.41，4.11，6.47 MPa，膏 体坍落、扩散度、泌水率分别为22.7 cm、42.6 cm、2.58%。材料配比中的三个影响因素分别为氟石膏含 量、粉煤灰含量和浆料浓度，其中对充填体1 d强度影响最大的因素是浆料浓度、7 d、28 d强度和泌水率 影响最大的因素是粉煤灰含量，对膏体坍落度和扩散度影响最大的因素是氟石膏含量。充填体的单轴破 坏形式为剪切破坏，内聚力和内摩擦角分别为2.02 MPa、32.6°。水化产物包含钙矾石、二水硫酸钙和水 化硅酸钙凝胶，氟石膏固结体由无水相转化为二水相，其中钙矾石和水化硅酸钙凝胶的增多会形成致密 结构，利于强度的提升。实验结果表明：以氟石膏制备的膏体浆料具备充填可行性，并且固废用量占 90%以上，成本较低，可以带来显著的经济效益，应用前景光明。

关键词:氟石膏基充填材料;力学特性;水化机理;水化产物;微观结构

中图分类号：TD803;TQ177.375

doi:10.16186/j.cnki.1673-9787.2023080046

基金项目:国家自然科学基金资助项目（52274076）；中国博士后科学基金（2023M733279）；河南省重点研发与推广专项（科技攻关）项目 （222102320011）

收稿日期:2023-08-31

修回日期:2023-10-23

网络首发日期:2023-11-30

Study on properties and hydration mechanism of new fluorine gypsum-basedfilling material（Online）

WANG Chun1,2, ZHANG Yifei1, ZHU Mingli1, REN Yumeng1, ZHAN Shuaifei1

1.School of Energy Science and Engineering，Henan Polytechnic University，Jiaozuo  454000， Henan，China;2.Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization， Jiaozuo  454000， Henan ，China

Abstract:Aiming at the problem of high cost of cement-based filling materials， fluoropgypsum and fly ash were used instead of cement as cementing materials. The optimal ratio of fluoropgypsum based filling materials was determined by orthogonal experiment method， and its mechanical properties， hydration products， hydration mechanism and microstructure were studied. Combined with the results of regression analysis and orthogonal experiment， the strength of the optimal matching material backfill for 1 d， 7 d and 28 d could reach 1.41 MPa， 4.11 MPa and 6.47 MPa， and the slump， diffusion and bleeding rate of the paste were 22.7 cm， 42.6 cm and 2.58% respectively. The three influencing factors in the material ratio are the content of fluorine gypsum， the content of fly ash and the concentration of slurry. The factor that has the greatest influence on the strength of filling belt is the concentration of slurry on the 1 d， the strength of 7 d and 28 d and the flow rate is the content of fly ash； the factor that has the greatest influence on the slump and diffusion of paste is the content of fluorine gypsum. The uniaxial failure mode of the backfill is shear failure， and the cohesion and internal friction angles are 2.02 MPa and 32.6° respectively. The hydration products include ettringite， calcium sulfate dihydrate and calcium silicate hydrate gel， and the fluorine gypsum consolidated body is transformed from anhydrous phase to diaqueous phase， in which the increase of ettringite and calcium silicate hydrate gel will form a dense structure， which is conducive to the improvement of strength. The experimental results show that the paste prepared with fluorine gypsum hasthe feasibility of filling, and the amount of solid waste accounts for more than 90%, the cost is low, it can bring significant economic benefits, and the application prospect is bright.

Key words:fluorine gypsum-based filling material;mechanical properties;hydration mechanism;hydration products;microstructure

CLC：TD803;TQ177.375