Experimental Study on the Expansion of a New Cement-Based Borehole Sealing Material Using Different Additives and Varied Water–Cement Ratios

Zhang, Chao; Liu, Hua; Li, Shugang; Liu, Chao; Qin, Lei; Chang, Jie; Cheng, Renhui

doi:10.1007/s13369-019-03837-3

Cited by 11 publications

(7 citation statements)

References 21 publications

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“…8,9 Considering the shortcomings of cement-based materials, researchers have carried out experiments and engineering applications of modified cement-based materials with inorganic additives as auxiliary materials. 10,11 Modified cement-based materials are superior to traditional inorganic materials in the following way: additives influence the hydration and hardening process of cement by combining with chemical compositions in cement, which in turn changes the physicochemical properties of original cement-based materials, thus improving the performance of cement slurry and satisfying the requirements of mine borehole sealing. 12,13 This study analyzed two modified inorganic cement-based materials with PC and SAC as the base.…”

Section: Introductionmentioning

confidence: 99%

“…Common inorganic sealing materials, including Portland cement (PC) and sulfate aluminate cement (SAC), are mainly based on cement. These materials are of low cost, are easy access, and are simple to prepare, but they still cannot seal boreholes tightly due to their shortcomings such as long coagulation time, easy shrinkage, and postcuring deformation and poor injectability. , Considering the shortcomings of cement-based materials, researchers have carried out experiments and engineering applications of modified cement-based materials with inorganic additives as auxiliary materials. , Modified cement-based materials are superior to traditional inorganic materials in the following way: additives influence the hydration and hardening process of cement by combining with chemical compositions in cement, which in turn changes the physicochemical properties of original cement-based materials, thus improving the performance of cement slurry and satisfying the requirements of mine borehole sealing. , …”

Section: Introductionmentioning

confidence: 99%

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Research Progress and Discussion on Modified Cement-Based Borehole Sealing Materials for Mining

Wang

Zhang

et al. 2023

ACS Omega

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As the concept of green mining develops, organic sealing materials are losing popularity in mining, yet the development of inorganic sealing materials for mining has become a research focus. The most common inorganic sealing materials are Portland cement (PC) and sulfate aluminate cement (SAC), but they fail to meet the performance requirements for sealing gas boreholes in complex coal seams due to their limitations. Thus, their performance needs to be modified. This study aims to explore and grasp the current development of inorganic modified cement-based materials from the perspective of improving the performance of cement-based materials of PC and SAC. First, the characteristics of the main hydration products of PC and SAC as well as the effects of these characteristics on their properties were analyzed. Next, the effects of additives such as admixtures, coagulant regulators, and nanomaterials on their properties including hydration properties, coagulation time, and strength were analyzed. Finally, the modification methods and mechanisms were discussed. It is proposed that the optimization of modification effects by various additives is of great practical significance for the development and application of modified PC and SAC in sealing gas boreholes in engineering practice.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research Progress and Discussion on Modified Cement-Based Borehole Sealing Materials for Mining

Wang

Zhang

et al. 2023

ACS Omega

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“…The polyurethane grouting sealing material expands through foaming, which generates a radial force in the borehole, and relies on this force to enter the rock mass fractures around the borehole to play a sealing effect. Therefore, many scholars have done a lot of research [ [10] , [11] , [12] , [13] , [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] , [22] , [23] ]. Guo [ 24 ]uses ultra-fine cement as the base material, and mixes with water reducing agent, expansion agent, retarder and water to form a colloidal sealing material with high fluidity and slightly better expansion.…”

Section: Introductionmentioning

confidence: 99%

Performance and application of new inorganic retarding sealing material suitable for multi-scale fractures

Cheng,

Ma,

Wang

et al. 2023

Heliyon

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“…Considering this fact, a certain number of additives are added into the cement to improve its performance, enhancing the microexpansion rate of the sealing material during hydration, controlling the setting time, and increasing the fluidity and mechanical strength . Zhou et al , carried out single-factor experiments on cement-based sealing materials with different additives and water–cement ratios and determined the influence of each factor on the expansion performance of sealing materials by the response surface methodology (RSM). Lian et al , explored the fluidity and compressive strength of the fly ash grouting material and the new cement-based reinforcement material, respectively.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance Investigation of Optimized Cement-Based Sealing Materials Based on the Response Surface Methodology

Zhang

Wang

et al. 2022

ACS Omega

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A new cement-based sealing material, which used Portland cement (PC) as a raw material and supplemented several gel components, such as accelerant, alkali activator, suspension agent, expansion agent, reinforcing agent, was prepared in this work. The effects of these components on the fluidity, setting time, and expansion rate of these sealing materials were investigated by an orthogonal test. The results show that the water–cement ratio and the reinforcing agent content, the accelerant content and the water–cement ratio, and the expansion agent content and the accelerant content are the most important influencing factors on fluidity, setting time, and expansion rate, respectively. In addition, the regression models and response surfaces of the factors were established using a multiple linear regression method. By this means, the influences of the two main factors on each performance of this sealing material were accurately and intuitively reflected for obtaining the optimal value in the optimization area. The results indicate that the sealing materials possess the best performances when the water–cement ratio is 1.1, the accelerant content is 50%, the expansion agent content is 0.1%, and the reinforcing agent content is 3%, which is corresponding to a fluidity of 360–380 mm, an initial (final) setting time of 60 (80)–80 (100) min, and an expansion rate of 2–12%. Furthermore, the microstructures of the optimized sealing material also reveal that the main hydration products of PC are transformed from layered Ca(OH) 2 crystals into fine needle-like AFt crystals and C–S–H gels by the promotion effect of the optimizing ratio, thus leading to a more compact structure of optimized cement-based sealing materials.

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Experimental Study on the Expansion of a New Cement-Based Borehole Sealing Material Using Different Additives and Varied Water–Cement Ratios

Cited by 11 publications

References 21 publications

Research Progress and Discussion on Modified Cement-Based Borehole Sealing Materials for Mining

Research Progress and Discussion on Modified Cement-Based Borehole Sealing Materials for Mining

Performance and application of new inorganic retarding sealing material suitable for multi-scale fractures

Preparation and Performance Investigation of Optimized Cement-Based Sealing Materials Based on the Response Surface Methodology

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