MTW European Type Trapezium Mill
Input size:30-50mm
Capacity: 3-50t/h
LM Vertical Roller Mill
Input size:38-65mm
Capacity: 13-70t/h
Raymond Mill
Input size:20-30mm
Capacity: 0.8-9.5t/h
Sand powder vertical mill
Input size:30-55mm
Capacity: 30-900t/h
LUM series superfine vertical roller grinding mill
Input size:10-20mm
Capacity: 5-18t/h
MW Micro Powder Mill
Input size:≤20mm
Capacity: 0.5-12t/h
LM Vertical Slag Mill
Input size:38-65mm
Capacity: 7-100t/h
LM Vertical Coal Mill
Input size:≤50mm
Capacity: 5-100t/h
TGM Trapezium Mill
Input size:25-40mm
Capacity: 3-36t/h
MB5X Pendulum Roller Grinding Mill
Input size:25-55mm
Capacity: 4-100t/h
Straight-Through Centrifugal Mill
Input size:30-40mm
Capacity: 15-45t/h
Calcium carbonate grouting ratio
Formulation and performance of nanocomposite claycement
In this study, we have developed a nanocomposite claycement based grouting material (CNGM) for use in waterbearing sandy soil We have also investigated how different ratios of raw materials affect the performance of the grouting material through response surface 2020年10月30日 In this paper, we describe a novel method to predict the amount of CaCO 3 in the process of biogrouting A total of 25 biogrouting tests were carried out with 6 treatment Quantitative method of calcium carbonate in biogrouting test 2017年8月1日 In this paper, we try to build some efficient grouting mixtures with different water to cement ratios considering these characteristics The ingredients of grout mixtures built in Optimization of cementbased grouts using chemical additives2024年5月16日 An analysis of the microstructure of the CCCW grouting material showed that the PNC803 and additives can promote the hydration of cement, which yields more hydration products, sealing water passage and filling micro Properties and Microstructure of a CementBased
Optimization of calcium carbonate whisker reinforced cement
2020年12月21日 Calcium carbonate whisker (CW) is an inorganic mineral reinforcing material with excellent micromechanical performance, microcrack resistance and environmentally 2023年2月17日 Controlled tests were designed based on three variables: crack width, presence or absence of media in the crack, and grouting method The results show that the smaller the crack width, the easierStudy on Calcium Carbonate Deposition of 2019年8月25日 Ground Calcium Carbonate (GCC) has been used for decades in construction to enhance performancecost ratio of cementbased products such as grout, mortar or concrete Innovative Use of Fine and Ultrafine GCC in Cementitious Systems2020年5月14日 In this work, the effect of w/b ratio on the compressive strength, hydration process, and products of calcium sulphoaluminate cement (CSA) CBGMs with and without LiAlLDH was studied Results indicate that with the Effect of watertobinder ratio on the properties of CSA
Study on Calcium Carbonate Deposition of
2023年1月11日 Controlled tests were designed based on three variables: crack width, presence or absence of media in the crack, and grouting method The results show that the smaller the crack width, the easier it is to achieve a seal 2020年8月14日 Increasing nanoCaCO3 content resulted in the first increase while later decrease of maximal fluid pressure (MFP) and sealing efficiency (SE) of grouts Reducing Effect of NanoCaCO3 on the Sealing Efficiency of Grouts in 2024年7月1日 In order to quantitatively analyze the optimal mixing ratio, experiments were conducted with different ratios of pea gravel to sand (05, 075, 10, 125, 15) and varying grouting frequencies (9 (PDF) Mechanism study and optimal proportioning test of pea calcium carbonate precipitation after 48 h Figure 3 Calcium carbonate conversion rate in different concentration reaction solution Figure 4 XRD spectrum of calcium carbonate sediments B Analysis of the Amount of Calcium Carbonate Precipitation The method of acidbase titration was adopt for the analysis of the conversion rate of Ca 2+Experimental Study of the Filling Effect of MICP Microbial Grouting
Effect of watertobinder ratio on the properties of
2020年5月14日 The calcium oxide content in quicklime was 653 wt%, including 155 wt% calcium carbonate Blaine fineness of sulfoaluminate clinker and anhydrite was 350 and 365 m 2 kg ratio of compressive strength of CBGM 2021年12月23日 When the pore ratio is 09, the pore volume of the silt sample is too large, and the bacterial liquid and the cementing liquid are not easily retained in the sample during the grouting process, resulting in the reduction in calcium carbonate production and strengthThe Effect of MICP on Physical and Mechanical Properties of Silt 2024年10月25日 The current mainstream soil treatment methods of EICP and MICP include grouting method, mixing method, and spraying method [14], [15], [16]During the grouting method, CaCO 3 is rapidly precipitated near the grouting inlet due to the rapid reactions, blocking the voids between soil particles and prevent further grouting As a result, uneven CaCO3 precipitation Evaluation of calcium carbonate production and cementitious 2016年3月29日 They were cured in the air, and their homogel uniaxial compression strengths were measured on days 1, 3, 7 and 28 Based on the test results, it was confirmed that the uniaxial strength of the specimen made with Bio Grouting Material, Ordinary Portland Cement and Micro Cement was increased by more than 30% than that of the specimen only used with Ordinary Analysis of Homogel Uniaxial Compression Strength on Bio Grouting
Properties of calcium sulfoaluminate cementbased grouting
selected and used as binders for grouting materials The calcium oxide content in quicklime was 703%, and the calcium carbonate content was 735% The mineralogical/ chemical compositions of CSA cementclinkerand anhydrite provided by the manufacturer are presented in Tables 1 and 2 Chemical reagents, such as sodium carbonate (Na 2CO 3),Download scientific diagram The relationship between the grouting pressure and improvement ratio unconfined compressive strength and calcite content (Modified from Soon et al 2014) from The relationship between the grouting pressure and improvement ratio concentration ratio of calcium acetate to calcium nitrate was maintained at 1 : 16 to ensure consistency with the denitrification MICP reaction Regarding the selection of calcium ion concentration in the cementing solution, it was considered that the optimal calcium ion concentration for C denitrificans is generally 15 mol l −1Study on the improvement of grouting stone properties in coal 2023年2月1日 The MICP technique has been proved to be an environmentally friendly soil reinforcement technology (Lin et al, 2020, Islam et al, 2020)Its biochemical reaction process is similar to bioinduced mineralization in nature (Muynck et al, 2010, Dejong et al, 2013, Gowthaman et al, 2020)Unlike the enzymeinduced carbonate precipitation (EICP) technique Assessment of the biocementation effect on shale soil using
Experimental study of the working property and strength behavior
2022年12月1日 Download Citation Experimental study of the working property and strength behavior of waste marine clay with high water content modified with quicklime, ground calcium carbonate, and a WXSII 2020年11月30日 (2) With the increase of alkalinity, amorphous calcium carbonate formed by the decalcification of CASH gel increases, the Ca/Si ratio in the CASH gel increases, and the Si/Al ratio decreases According to the EDS analysis, with the increase of alkalinity, the surface decalcification and carbonation increase [61] , [62] Expansion behavior and microstructure change of alkaliactivated 2024年1月4日 Microbial calcium carbonate precipitation is a favourable approach due to its environmental the above problems, such as uneven consolidation, clogging of the grouting port, and voids in the specimen After grouting is completed, the bacterial liquid is Water cement ratio Cement/(kg/m 3) Coarse aggregate/(kg/m 3) Water/(kg/m 3 Experimental study on alkali reduction of filmcoated porous In addition, it was confirmed that the strength increment ratio of specimens cured for 28 days under various mixing conditions linearly increased with calcium carbonate contents ranging from 0% to Table 1 Mixing ratios for uniaxial compressive strength test
Study on the mechanism and optimal proportioning test of pea
Rock and Soil Mechanics ›› 2024, Vol 45 ›› Issue (7): 20372049 doi: 1016285/jrsm20231123 • Fundamental Theory and Experimental Research • Previous Articles Next Articles Study on the mechanism and optimal proportioning test of pea gravel backfill behind TBM tunnel linings reinforced with enzymeinduced calcium carbonate precipitation (EICP) technology2020年7月21日 These carbonate ions then combine with calcium ions from the surrounding environment to produce calcium carbonate which has cementing properties in the soilThe generated calcium carbonate binds Factors Affecting Permeability Reduction of MICP for Fractured Rock2024年12月2日 Porous Sandstone Sealed with MicrobiallyInduced Calcium Carbonate Precipitation: BioGrouting Pressure Evolution and Microstructure Response 26 Pages Posted: 2 Dec 2024 See all articles by Chenpeng Song Microbiallyinduced calcium carbonate precipitation (MICP) has been shown to seal rock fractures and clog soil poresPorous Sandstone Sealed with MicrobiallyInduced Calcium Carbonate 2019年4月14日 The influence of aluminum sulfate content and the quicklime/fluorgypsum ratio on the setting time, compressive strength, hydration heat and hydration products in calcium sulfoaluminate cementbased double liquid grouting materials with a water/cement ratio of 1:1 were studied and the following conclusions can be made:Effects of Aluminum Sulfate and Quicklime/Fluorgypsum Ratio on
Allsolidwaste cementitious materials for grouting: Effects of
As shown in Fig 5 a, the Ca/Si ratios were 325 for A6, 235 for A2, and only 128 for A8, suggesting that the incorporation of aluminumsilicate materials (FA) significantly reduces the gel Ca/Si ratio, resulting in a gel structure resembling a C 2013年8月1日 The change law of gel time of calcium carbonateacid water glass grouting material with the content of calcium carbonate is researched in this paper But the gel time does not increase evenly with reduction calcium carbonic reducing It increases suddenly because there is sudden exceeding range with the solution pH value increasing Meanwhile, the change The Research and Comparing Test on Calcium CarbonateAcid 2020年1月1日 Data suggest that in almost the equivalent calcium carbonate content, a total of 10 types of grouting mixing ratios were prepared by a combination of different materials such as Ordinary Environmental impacts of chemical and microbial 2023年10月12日 Coupling reinforcement of uranium tailings via Klebsiellainduced calcium carbonate precipitation and waterborne polyurethane Author links Wang et al [40] chose the ratio of deviatoric stress increment to the axial strain increment at 1 New chemical grouting materials and rapid construction technology for inclined shaft Coupling reinforcement of uranium tailings via ScienceDirect
Study on the mechanism and optimal proportioning test of pea
Rock and Soil Mechanics ›› 2024, Vol 45 ›› Issue (7): 20372049 doi: 1016285/jrsm20231123 • Fundamental Theory and Experimental Research • Previous Articles Next Articles Study on the mechanism and optimal proportioning test of pea gravel backfill behind TBM tunnel linings reinforced with enzymeinduced calcium carbonate precipitation (EICP) technology2019年9月24日 LiAlLDH, sulfoaluminate cement, watertobinder ratios, grouting materials Introduction Cementbased grouting materials (CBGMs) are usually applied in repair and consolidation and the suspension con 155 wt% calcium carbonate Blaine fineness of sulfoaluminate clinker and anhydrite was 350 and 365 m2 kg 1, respectively, Effect of watertobinder ratio on the properties of CSA cement Download scientific diagram Effect of calcium carbonate on elastic modulus in both cement and microbially treated sand after 28 days from publication: Environmental impacts of chemical and Effect of calcium carbonate on elastic modulus in both cement2023年1月11日 Microbially induced calcium carbonate deposition (MICP) restoration technology has good restoration effects and low environmental pollution compared with traditional restoration methods, and this technology has been applied in actual projects However, grouting components such as bacterial solutions are easily lost in vertical cracks due to their low viscosity as well as Study on Calcium Carbonate Deposition of Microorganism Bottom Grouting
Distribution of calcium carbonate on fracture surface (A) Fracture
These carbonate ions then combine with calcium ions from the surrounding environment to produce calcium carbonate which has cementing properties in the soilThe generated calcium carbonate binds 2022年5月1日 Microbiallyinduced calcium carbonate precipitation (MICP) is a promising grouting material for subsurface remediation due to its waterlike viscosity and excellent penetrationPermeable rock matrix sealed with microbiallyinduced calcium carbonate However, if the grouting rate is lower than the rate of calcium carbonate Fig 21 The relationship between the relative density of siliceous sand and UCS (Modified from Kim et al 2013) formation Specimen mixing ratios of sand, silt and weathered soil 2020年12月8日 Formula shows that the urease secreted by ureaseproducing bacteria decomposes dissolved urea into carbonate ions, and then cemented calcium carbonate precipitates from the solution, along with carbonate ions and calcium ionsThe permeability coefficients of in situ fractured rock and fabricated rock, grouted by MICP, were reduced by Permeability Reduction and Electrochemical Impedance of
(PDF) Mechanism study and optimal proportioning test of pea
2024年7月1日 In order to quantitatively analyze the optimal mixing ratio, experiments were conducted with different ratios of pea gravel to sand (05, 075, 10, 125, 15) and varying grouting frequencies (9 calcium carbonate precipitation after 48 h Figure 3 Calcium carbonate conversion rate in different concentration reaction solution Figure 4 XRD spectrum of calcium carbonate sediments B Analysis of the Amount of Calcium Carbonate Precipitation The method of acidbase titration was adopt for the analysis of the conversion rate of Ca 2+Experimental Study of the Filling Effect of MICP Microbial Grouting 2020年5月14日 The calcium oxide content in quicklime was 653 wt%, including 155 wt% calcium carbonate Blaine fineness of sulfoaluminate clinker and anhydrite was 350 and 365 m 2 kg ratio of compressive strength of CBGM Effect of watertobinder ratio on the properties of 2021年12月23日 When the pore ratio is 09, the pore volume of the silt sample is too large, and the bacterial liquid and the cementing liquid are not easily retained in the sample during the grouting process, resulting in the reduction in calcium carbonate production and strengthThe Effect of MICP on Physical and Mechanical Properties of Silt
Evaluation of calcium carbonate production and cementitious
2024年10月25日 The current mainstream soil treatment methods of EICP and MICP include grouting method, mixing method, and spraying method [14], [15], [16]During the grouting method, CaCO 3 is rapidly precipitated near the grouting inlet due to the rapid reactions, blocking the voids between soil particles and prevent further grouting As a result, uneven CaCO3 precipitation 2016年3月29日 They were cured in the air, and their homogel uniaxial compression strengths were measured on days 1, 3, 7 and 28 Based on the test results, it was confirmed that the uniaxial strength of the specimen made with Bio Grouting Material, Ordinary Portland Cement and Micro Cement was increased by more than 30% than that of the specimen only used with Ordinary Analysis of Homogel Uniaxial Compression Strength on Bio Grouting selected and used as binders for grouting materials The calcium oxide content in quicklime was 703%, and the calcium carbonate content was 735% The mineralogical/ chemical compositions of CSA cementclinkerand anhydrite provided by the manufacturer are presented in Tables 1 and 2 Chemical reagents, such as sodium carbonate (Na 2CO 3),Properties of calcium sulfoaluminate cementbased grouting Download scientific diagram The relationship between the grouting pressure and improvement ratio unconfined compressive strength and calcite content (Modified from Soon et al 2014) from The relationship between the grouting pressure and improvement ratio
Study on the improvement of grouting stone properties in coal
concentration ratio of calcium acetate to calcium nitrate was maintained at 1 : 16 to ensure consistency with the denitrification MICP reaction Regarding the selection of calcium ion concentration in the cementing solution, it was considered that the optimal calcium ion concentration for C denitrificans is generally 15 mol l −12023年2月1日 The MICP technique has been proved to be an environmentally friendly soil reinforcement technology (Lin et al, 2020, Islam et al, 2020)Its biochemical reaction process is similar to bioinduced mineralization in nature (Muynck et al, 2010, Dejong et al, 2013, Gowthaman et al, 2020)Unlike the enzymeinduced carbonate precipitation (EICP) technique Assessment of the biocementation effect on shale soil using