Laboratory Tests on Performance of Waste‐Clay‐Brick‐Powder Cement Grouting Materials for Ground Improvement in Mine Goaf

Dun, Zhilin; Wang, Mengqi; Zou, Youfeng; Ren, Lianwei

doi:10.1002/adem.202101575

Cited by 9 publications

(10 citation statements)

References 25 publications

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“…From the previous test results (References [ 37 , 38 ]), it can be seen that the change of viscosity has a great influence on the water separation rate and stone rate of the slurry. The water separation rate and stone rate of the slurry under different replacement rates are shown in Figure 10 .…”

Section: Resultsmentioning

confidence: 99%

“…The properties of waste brick powder–cement grout (WBP cement grout) and waste concrete powder–cement grout (WCP cement grout) were analyzed in [ 37 , 38 ], respectively. According to the research results in this paper, the performances of the three kinds of grout can be compared to find out their corresponding advantages, so that the most suitable grout proportion can be selected according to the requirements in practical engineering.…”

Section: Discussionmentioning

confidence: 99%

“…The test results are shown in Table 2. According to literature [37,38], waste brick powder has the advantages of short grinding time, less energy consumption, and high pozzolanic activity, but the disadvantages of poor water absorption, high water separation rate, and low stone rate. The waste concrete powder has the advantages of strong water absorption, low water separation rate, and high stone rate, but it has the disadvantages of long grinding time, high energy consumption, high viscosity, and poor fluidity.…”

Section: Raw Materialsmentioning

confidence: 99%

“… Particle size grading of two kinds of powders. Reproduced with permission [ 37 , 38 ], 2022, Springer and Hindawi. …”

Section: Figurementioning

confidence: 99%

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Experimental Research on Application of Waste Concrete Powder–Waste Brick Powder–Cement Grout for Foundation Reinforcement in Mining Goaf

Wang,

Wang

et al. 2023

Materials

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Combined with a strategic policy for the recycling of construction waste, this paper puts forward a programme for treating a goaf foundation with waste concrete powder, waste brick powder, and cement grout (BCP cement grout). The BCP cement grout is prepared by replacing part of the waste concrete powder with waste brick powder, and the changeable rule of the setting time, water separation rate, stone rate, and viscosity of the grout with different rates for replacement are studied. X-ray diffraction (XRD) and scanning electron microscopy (SEM) are carried out. The mineral composition is analyzed and the microscopic mechanism is studied. The results show that the ratio of BCP cement grout developed by the experiment is reasonable; the unit cost is less than 160 yuan/t, which is 40% lower than that of pure cement grout; and both a good economic effect and good environmental effect are obtained. It has the advantages of low water separation rate, high stone rate, and low viscosity. When the ratio of cement powder: waste concrete powder: waste brick powder is 3:5:2 or 3:6:1, the 28 d compressive strength of the stone body is more than 2 MPa, meeting the filling requirements for a goaf foundation. It is not only technically feasible but also economically reasonable to apply construction waste powder to fill the goaf foundation. Recycling and utilizing construction waste can also achieve the ecological restoration of mined-out areas, highlighting the ecological benefits.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Raw Materialsmentioning

confidence: 99%

“… Particle size grading of two kinds of powders. Reproduced with permission [ 37 , 38 ], 2022, Springer and Hindawi. …”

Section: Figurementioning

confidence: 99%

See 2 more Smart Citations

Experimental Research on Application of Waste Concrete Powder–Waste Brick Powder–Cement Grout for Foundation Reinforcement in Mining Goaf

Wang,

Wang

et al. 2023

Materials

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“…Currently, reinforcement is the most effective method for treating goaf areas [ 13 , 14 ]. Grouting reinforcement is a widely employed treatment measure for both domestic and international highway goaf zones [ 15 , 16 , 17 ]. It involves injecting a configured slurry material into the rock and soil of the goaf area using appropriate equipment.…”

Section: Introductionmentioning

confidence: 99%

Study on Preparation and Performance of Foamed Lightweight Soil Grouting Material for Goaf Treatment

Zhao¹,

Chen²,

Zhang

et al. 2023

Materials

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The harm goafs and other underground cavities cause to roads, which could lead to secondary geological hazards, has attracted increased attention. This study focuses on developing and evaluating the effectiveness of foamed lightweight soil grouting material for goaf treatment. The study examines the foam stability of different foaming agent dilution ratios by analyzing foam density, foaming ratio, settlement distance, and bleeding volume. The results show that there is no significant variation in foam settlement distance for different dilution ratios, and the difference in foaming ratio does not exceed 0.4 times. However, the bleeding volume is positively correlated with the dilution ratio of the foaming agent. At a dilution ratio of 60×, the bleeding volume is about 1.5 times greater than that at 40×, which reduces foam stability. Furthermore, an appropriate amount of sodium dodecyl benzene sulfonate improves both the foaming ability of the foaming agent and the stability of the foam. Additionally, this study investigates how the water–solid ratio affects the basic physical properties, water absorption, and stability of foamed lightweight soil. Foamed lightweight soil with target volumetric weights of 6.0 kN/m3 and 7.0 kN/m3 meet the flow value requirement of 170~190 mm when the water–solid ratio ranges are set at 1:1.6~1:1.9 and 1:1.9~1:2.0, respectively. With an increasing proportion of solids in the water–solid ratio, the unconfined compressive strength initially increases and then decreases after 7 and 28 days, reaching its maximum value when the water–solid ratio is between 1:1.7 and 1:1.8. The values of unconfined compressive strength at 28 days are approximately 1.5–2 times higher than those at 7 days. When the water ratio is excessively high, the water absorption rate of foamed lightweight soil increases, resulting in the formation of connected pores inside the material. Therefore, the water–solid ratio should not be set at 1:1.6. During the dry–wet cycle test, the unconfined compressive strength of foamed lightweight soil decreases, but the rate of strength loss is relatively low. The prepared foamed lightweight soil meets the durability requirements during dry–wet cycles. The outcomes of this study may aid the development of enhanced approaches for goaf treatment using foamed lightweight soil grout material.

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Reusing waste clay brick powder for low-carbon cement concrete and alkali-activated concrete: A critical review

Wu,

Gao,

Liu

et al. 2024

Journal of Cleaner Production

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Laboratory Tests on Performance of Waste‐Clay‐Brick‐Powder Cement Grouting Materials for Ground Improvement in Mine Goaf

Cited by 9 publications

References 25 publications

Experimental Research on Application of Waste Concrete Powder–Waste Brick Powder–Cement Grout for Foundation Reinforcement in Mining Goaf

Experimental Research on Application of Waste Concrete Powder–Waste Brick Powder–Cement Grout for Foundation Reinforcement in Mining Goaf

Study on Preparation and Performance of Foamed Lightweight Soil Grouting Material for Goaf Treatment

Reusing waste clay brick powder for low-carbon cement concrete and alkali-activated concrete: A critical review

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