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
High calcium powder concrete cracks
High strength bioconcrete for the production of building
2023年12月13日 In the present study, a combination of methods was implemented, including the use of ureaseactive calcium carbonate powder (UACP) instead of free bacterial cells, 2022年5月15日 One of the novel selfhealing mechanisms is using bacterial induced calcite precipitation in concrete mixtures to heal concrete cracks In this technique, bacterial A systematic review of bacteriabased selfhealing concrete 2024年1月12日 In this study, powdered microbial spores were directly mixed into concrete with calcium nitrate as an additional calcium source Microbial concrete was poured into the side Application of microbially induced calcium carbonate precipitation Concrete and reinforced concrete exhibit an intrinsic ability to heal cracks, defined by RILEM technical committee as “autogenous selfhealing” 8 This effect includes the precipitation of calcium carbonate in the presence of water and Autogenous self‐healing of concrete: Experimental
Microbial healing of cracks in concrete: a review Journal of
2017年9月12日 Early age formation of microcracking in concrete structure severely affects the serviceability leading to high cost of maintenance Apart from conventional methods of 2022年2月11日 This article has reviewed the effectiveness of microbially induced calcium carbonate precipitation (MICCP) to retrofit cement and concrete for boosting its strength, Microbial calcite induction: a magic that fortifies and heals 2023年1月19日 Few investigations have characterized earlyage properties and cracking potential of concrete with nanomaterials The present study aimed to expand the limitation by Effect of NanoCaCO3 on EarlyAge Properties and Cracking 2024年2月20日 Research has shown that nanosio 2 has high activity, and has potential to form a new calcium silicate hydrate gel phase in combination with cement hydration products, filling Surface crack treatment of concrete via nanomodified microbial
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Study on leaching damage mechanism of calcium ions of reactive
2021年2月1日 When the concentration of calcium ions in concrete was less than 20 mmol/L, the CH crystals first dissolved to compensate for the loss of calcium ions, which led to an increase 2021年2月1日 Study on leaching damage mechanism of calcium ions of reactive powder concrete (RPC) under ion corrosion Author links open overlay which led to an increase in RPC pores and cracks When the concentration of calcium ion was less than 4 Dynamic compressive properties of reactive powder concrete at high temperature: a review Study on leaching damage mechanism of calcium ions of reactive powder 2021年10月12日 Ultra high performance concrete refers to a class of advanced and engineered cementitious composite materials that have a superior mechanical and durability properties, compared to conventional Ultra high performance concrete (UHPC): reactive 2024年10月15日 Immobilizing selfhealing microorganisms for concrete crack repair plays crucial roles It shields the bacteria from concrete's high alkalinity, provides a growth and metabolic space for the microorganisms, and delivers essential nutrients and mineralization substrates for effective mineralization reactions, resulting in calcium carbonate precipitation Exploring a celluloseimmobilized bacteria for selfhealing concrete
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Effect of calcium stearate and aluminum powder on free and
2022年1月1日 In general, presented results in Fig 14 indicate the good performance of aluminum powder and calcium stearate additives in delaying the formation of the first crack in concrete After the first crack occurred, a sharp decrease in the amount of strain in the steel ring was observed which was due to release of the potential stress in concrete2022年9月15日 Further hydration as the origin of selfhealing in ultrahigh performance concrete (UHPC) is highly concerned However, UHPC generally serves in the marine environment The effects of the chloride ions on this process have not been sufficiently considered Herein, the effects of water and chloride ions on the further hydration of the cement paste with silica fume Microstructural characterization of ultrahigh performance concrete Concrete is the most widely used construction material globally, valued for its high compressive strength and durability However, cracking is a common problem in concrete elements, significantly reducing service life and durability [1], [2], [3]Early age cracking, occurring within the first few days after casting, is particularly detrimental as it allows ingress of aggressive Investigating the early age crack resistance of concrete treated 2024年6月25日 Geopolymer concretes have emerged as an alternative to traditional Portland cement concretes with high strength, good durability, well corrosion performance and hightemperature resistance, and being a sustainable and environmentally friendly material In this study, a comprehensive microstructural analysis of lowcalcium fly ashbased geopolymer Microstructural Analysis of LowCalcium Fly AshBased
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Surface crack treatment of concrete via nanomodified microbial
2024年2月20日 As a new concrete crack patching technology, microbial selfhealing slurries offer favourable characteristics including nonpollution, ecological sustainability and good compatibility with concrete In this paper, a nanosio2modified microbial bacteria liquid, combined with sodium alginate and polyvinyl alcohol, was used to prepare a nanomodified microbial self 2019年11月1日 Strain AK13 appears to heal cracks on mortar specimens when applied as a pelletized spore powder Alkaliphilic Bacillus sp AK13 is a promising candidate for selfhealing agents in concrete(PDF) Complete Genome and Calcium Carbonate Precipitation 2016年3月1日 Concrete is one of the most widely used construction materials and has a high tendency to form cracks These cracks lead to significant reduction in concrete service life and high replacement costs(PDF) Bioconcrete: next generation of selfhealing concrete2024年6月1日 Nanosilica has emerged as a promising nanomaterial to improve the properties of recycled aggregate concrete since it reacts with calcium hydroxide (CH) to produce calciumsilicatehydrates (CSH) [7]Numerous studies have demonstrated the benefits of nanosilica on the macroscopic properties of cementbased materials with recycled concrete aggregatesColloidal nanosilica promotes highdensity calciumsilicate
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Study on accelerating activation of recycled hardened concrete powder
2024年1月1日 A novel highthroughput strategy was developed to determine the calcium precipitation activity (CPA) of mineralization bacteria used for selfhealing of concrete cracksDOI: 101080/2024 Corpus ID: ; Study on calcium dissolution of concrete specimens with surface cracks @article{Jiang2024StudyOC, title={Study on calcium dissolution of concrete specimens with surface cracks}, author={JianHua Jiang and JiaBing Zhou and FuLiang Ma and Wei Zhang and YaBing Yu}, journal={European Journal of Study on calcium dissolution of concrete specimens with surface cracks 2021年7月9日 Here, through extensive experimentation, the postheated mineralogical and physicochemical features of calcium aluminate cement concrete (CACC) were examined via DTA/TGA, Xray diffraction (XRD Physicochemical, Mineralogical, and Mechanical Properties of Calcium 2022年2月11日 Abstract Prevention of concrete structure from premature deterioration has become a major challenge around the world, and its high maintenance cost demands an ecofriendly and economical alternative Apart from the conventional healing of cracks using chemicals, a microbial crack repairing strategy has given promising results The concept of bio Microbial calcite induction: a magic that fortifies and heals concrete
Microbial healing of cracks in concrete: a review Journal of
2017年9月12日 Concrete is the most widely used construction material of the world and maintaining concrete structures from premature deterioration is proving to be a great challenge Early age formation of microcracking in concrete structure severely affects the serviceability leading to high cost of maintenance Apart from conventional methods of repairing cracks with 2023年11月9日 The use of bacteria to improve the mechanical and durability properties of concrete was investigated in this study B subtilis bacteria were incorporated into normal strength concrete at a concentration of 108 cells/ml A total of 66 concrete specimens were cast and tested for mechanical and durability properties (compressive strength, flexural strength, UPV, water Selfhealing performance of normal strength concrete with2024年1月29日 Cracking occurred 4 h after concrete pouring for 30OPC and 14 d after concrete pouring for 30E1I3 30E1I1 exhibited no crack and met the allowable crack width of 03 mm in the crack defect Mockup performance evaluation study for crack reduction of 2024年7月1日 A lowcarbon and environmentally friendly EICP method for repairing concrete cracks is presented to prolong the service life of concrete In this study, we took concrete as the research object and quartz sand as the filling medium and employed the EICP injection method to repair concrete cracks The internal repair effect of EICP on concrete cracks was evaluated Experimental Study on the Crack Concrete Repaired via Enzyme
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Unlocking the efficacy of cementshell encapsulation for microbial
2024年9月1日 The selfhealing of concrete cracks through bacterial action relies on microbialinduced calcium carbonate precipitation (MICP) [8]MICP is a biomineralization process where microorganisms facilitate the precipitation of calcium carbonate (CaCO 3), influencing various environmental and engineering applications [9, 10]Several factors as indicated in Fig 1 2021年10月16日 In this research used MgO powder have been particles size ≥ 0241 ≤ 1023 μm while particles size of cement was ≥ 238 ≤ 28988 μm MgO powder adding to the mixtures with ratios (1, 2, 3 (PDF) Compressive strength and shrinkage of concrete containing calcium 2024年2月1日 Given the attractive potential for future applications of geopolymer concrete, understanding the impact of calcium content and pH value of MICP crack healing in geopolymer concrete mix design is of great importance In this study, it was found that high calcium content in geopolymer concrete mix design is helpful to improve the healing effectImpact of calcium content and pH value on MICP crack healing of 2023年5月16日 In order to reduce costs and improve whiteness, industrialgrade heavy calcium carbonate powder (IHCP) is used in white highstrength concrete (WHSC), the influence of IHCP on the workability, whiteness, mechanical properties, chloride ion impermeability, carbonation resistance and shrinkage properties of WHSC is systematically studied, and then the related Effect of industrialgrade heavy calcium carbonate powder on
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Study on leaching damage mechanism of calcium ions of reactive powder
2021年2月1日 Taking the calcium leaching failure of Pushihe hydropower station in Kuandian, Liaoning Province, China as the engineering background, the loss of calcium in the dam concrete will lead to the increase of internal pores and cracks, and then lead to the deterioration of mechanical properties, structural stability and durability, which poses a serious threat to the 2022年5月15日 Most commonly, the crack healing procedure in bacterial concrete entails a phase of crack propagation, bacterial activation, chemical reaction, CaCO 3 production and final crack sealing (see Fig 1) [15, 23] Nonetheless, the appropriate hydration in concrete requires a high pH value [30], which can affect the microA systematic review of bacteriabased selfhealing concrete Over the past two decades, concrete manufacturing has experimented with various supplementary cementitious materials (SCMs) to enhance sustainability, performance, and durability [13] such as fly ash [14], corn cob ash [15], rice husk ash [16], metakaolin [8]These materials consume less than ordinary Portland cement, which is emissionintensiveSynergizing Portland Cement, highvolume fly ash and calcined calcium 2024年10月25日 Fig 19 shows the LCA analysis of highstrength concrete (HSCCAM) samples with cement and slag/calciumoxide binders containing 30 % rubber or PET powder The study was conducted using the IMPACT 2002+ methodNovel ecofriendly highstrength concrete based on slag
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Properties of concrete with eggshell powder: A review
2020年12月1日 Eggshell has a very high content of calcium The content is so significant that in many countries dry eggshell is used as a source of calcium in animal feeds (Faridi and Arabhosseini, 2018)It primarily consists of multiple layers of calcium carbonate, CaCO 3 or about 55 g of the compound (Bhaskaran et al, 2016)The overall chemical composition of eggshell 2024年2月29日 Concrete often suffers cracks due to its low tensile strength The repair process can vary ranging from surface coating, grouting, and strengthening Microbial induced calcium carbonate sedimentation process (MICP) is a process of utilizing nonpathogenic bacteria to produce calcium carbonate through its urease activity in crack repair (filling) It is known as an Use of buffer treatment to utilize local nonalkali tolerant bacteria 2021年9月27日 1 Introduction UltraHigh Performance Concrete (UHPC for short) is a relatively new cementbased materials in recent years Larrard first proposed the name of UHPC for this “new composite materials” in 1994 [1]UHPC has excellent mechanical properties, durability and high toughness [2], [3], [4] due to its particle close packing, lower waterbinder ratio, steel Evaluation and regulation of UltraHigh Performance Concrete 2021年2月1日 Study on leaching damage mechanism of calcium ions of reactive powder concrete (RPC) under ion corrosion Author links open overlay which led to an increase in RPC pores and cracks When the concentration of calcium ion was less than 4 Dynamic compressive properties of reactive powder concrete at high temperature: a review Study on leaching damage mechanism of calcium ions of reactive powder
Ultra high performance concrete (UHPC): reactive
2021年10月12日 Ultra high performance concrete refers to a class of advanced and engineered cementitious composite materials that have a superior mechanical and durability properties, compared to conventional 2024年10月15日 Immobilizing selfhealing microorganisms for concrete crack repair plays crucial roles It shields the bacteria from concrete's high alkalinity, provides a growth and metabolic space for the microorganisms, and delivers essential nutrients and mineralization substrates for effective mineralization reactions, resulting in calcium carbonate precipitation Exploring a celluloseimmobilized bacteria for selfhealing concrete 2022年1月1日 In general, presented results in Fig 14 indicate the good performance of aluminum powder and calcium stearate additives in delaying the formation of the first crack in concrete After the first crack occurred, a sharp decrease in the amount of strain in the steel ring was observed which was due to release of the potential stress in concreteEffect of calcium stearate and aluminum powder on free and 2022年9月15日 Further hydration as the origin of selfhealing in ultrahigh performance concrete (UHPC) is highly concerned However, UHPC generally serves in the marine environment The effects of the chloride ions on this process have not been sufficiently considered Herein, the effects of water and chloride ions on the further hydration of the cement paste with silica fume Microstructural characterization of ultrahigh performance concrete
Investigating the early age crack resistance of concrete treated
Concrete is the most widely used construction material globally, valued for its high compressive strength and durability However, cracking is a common problem in concrete elements, significantly reducing service life and durability [1], [2], [3]Early age cracking, occurring within the first few days after casting, is particularly detrimental as it allows ingress of aggressive 2024年6月25日 Geopolymer concretes have emerged as an alternative to traditional Portland cement concretes with high strength, good durability, well corrosion performance and hightemperature resistance, and being a sustainable and environmentally friendly material In this study, a comprehensive microstructural analysis of lowcalcium fly ashbased geopolymer Microstructural Analysis of LowCalcium Fly AshBased 2024年2月20日 As a new concrete crack patching technology, microbial selfhealing slurries offer favourable characteristics including nonpollution, ecological sustainability and good compatibility with concrete In this paper, a nanosio2modified microbial bacteria liquid, combined with sodium alginate and polyvinyl alcohol, was used to prepare a nanomodified microbial self Surface crack treatment of concrete via nanomodified microbial 2019年11月1日 Strain AK13 appears to heal cracks on mortar specimens when applied as a pelletized spore powder Alkaliphilic Bacillus sp AK13 is a promising candidate for selfhealing agents in concrete(PDF) Complete Genome and Calcium Carbonate Precipitation
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(PDF) Bioconcrete: next generation of selfhealing concrete
2016年3月1日 Concrete is one of the most widely used construction materials and has a high tendency to form cracks These cracks lead to significant reduction in concrete service life and high replacement costs