is cement mixed with coal gangue to make mortar fluidity in Indonesia
Manufacturing ultra-high performance geopolymer concrete …
In this study, calcined coal gangue aggregates and calcined coal gangue powder are used to prepare ultra-high performance geopolymer concrete (UHPGC). The result indicates that the higher concentration of Q 3 (−101.1) [SiO 4 ] structure and four- and five-coordinated Al, the higher the reactivity of calcined coal gangue.
WhatsApp: +86 18221755073
Effect and mechanism of coal gangue concrete
Coal gangue concrete (CGC) with 30% fly ash (FA) content has the best workability and strength. • The modification effect of FA on the working properties and …
WhatsApp: +86 18221755073
Synergic performance of low-kaolinite calcined coal gangue …
Utilization of calcined coal gangue (CCG) as cement replacement has the potential to relieve the environmental burden and reduce clinker consumption. However, …
WhatsApp: +86 18221755073
Multitechnique investigation of concrete with coal gangue
Hence, the study on coal gangue concrete has been focused on by many scholars in recent years [9, 10], and the results indicate that the mechanical behaviors of coal gangue concrete, made by ...
WhatsApp: +86 18221755073
Properties of Fiber-Reinforced Geopolymer Mortar Using Coal Gangue …
Geopolymers, as a novel cementitious material, exhibit typical brittle failure characteristics under stress. To mitigate this brittleness, fibers can be incorporated to enhance toughness. This study investigates the effects of varying polypropylene fiber (PPF) content and fiber length on the flowability, mechanical properties, and flexural toughness …
WhatsApp: +86 18221755073
Design and Properties of Coal Gangue-Based Geopolymer Mortar
The feasibility of preparing coal gangue-based geopolymer mortar (CGBGM) with composite-activated coal gangue was experimentally explored in this paper. The effects of water-to-binder ratio (W/B), alkali content (A), and slag content (S) on the fluidity and performances of the CGBGM were experimentally investigated. The …
WhatsApp: +86 18221755073
Identification and Activation of Coal Gangue and …
The reactivity test—mortar strength method: comparison measurement of 28-day age mortar strength for reference cement and targeted samples prepared by …
WhatsApp: +86 18221755073
Damage and Deterioration Mechanism of Coal Gangue Mixed …
2.2 Mix Proportion. According to JGJ51-2019 "Technical Specification for Light Aggregate Concrete," the water–cement ratio of coal gangue mixed aggregate concrete is a fixed value of 0.43, and coarse aggregate of coal gangue replaces coarse aggregate of pumice with equal volume, with substitution rates of 0%, 20%, 40%, 60%, …
WhatsApp: +86 18221755073
Mechanical properties of concrete prepared using seawater, …
Generally, the amount of wetting water is 60 % of the water absorption an hour. First, cement, sand and water are added to the mixer for full mixing to form a uniform cement mortar. Then SCG aggregate is put into the mixer for stirring again. The mixed concrete is poured into the mold first and then vibrated on the vibration table.
WhatsApp: +86 18221755073
Research regarding the influence of size on the compressive …
Coal gangue is a byproduct produced in the process of coal mining, consisting of a heterogeneous mixture of rock minerals with a relatively low rate of utilization. The self-ignition of residual coal can result in the emission of sulfur, chlorides, and heavy metals, which contribute to environmental contamination [1], [2].
WhatsApp: +86 18221755073
Drying shrinkage behavior of geopolymer mortar based on kaolinitic coal
Replacement of CST for Portland cement (Geo-M-PC) increases the fluidity; coal sludge calcined is composed of metakaolinite with higher specific surface and plate-like morphology (Fig. 1), requiring higher water content during the mix to wet all particles, resulting in lower fluidity [12]. The fluidity of Geo-M is sensitive to changes in binder ...
WhatsApp: +86 18221755073
Reactivity activation of waste coal gangue and its impact …
The cement mortar containing 800 °C calcined coal gangue exhibited an 18% increment in 28 days compressive strength as compared to the control mix. The results also indicated that CH consumption increased as the calcined temperature increased from 500 to 800 °C, and then decreased marginally for the case of coal …
WhatsApp: +86 18221755073
The influence of fly ash content on ITZ microstructure of coal gangue
1. Introduction. Coal gangue is the main solid waste produced in coal mining and preparation, and its resource utilization has become a hot issue in countries that use coal as the main source of energy [1], [2].An effective resource utilization method is using coal gangue instead of crushed stone to prepare concrete, which can not only solve …
WhatsApp: +86 18221755073
Pozzolanic activity of burned coal gangue and its effects on …
When the coal gangue burned at 750 °C is mixed into portland cement, the content of calcium hydroxide in paste is significantly reduced, while the contents of hydrated calcium silicate and hydrated calcium aluminate are increased accordingly, hence resulting in the improvement of the microstructure of mortar.
WhatsApp: +86 18221755073
Crack Propagation Phenomenon in Gangue Concrete Using …
The crack propagation process of the coal gangue concrete specimen is divided into three stages as follows: the elastic section before crack initiation, extended viscoelastic section, and extended fracture section. The ultimate load and crack opening displacement of coal gangue concrete decrease with the increase of the coal gangue …
WhatsApp: +86 18221755073
Experimental and analytical model of CFRP-confined …
In this study, carbon fiber reinforced polymer (CFRP) confined cylindrical concrete specimens were tested under monotonic axial loading. The effects of the replacement ratio of the spontaneous combustion coal gangue aggregate (SCGA) and stiffness of the CFRP confinement on the mechanical properties of concrete were …
WhatsApp: +86 18221755073
Characteristics of Alkali-Activated Coal Gangue-Slag …
The high SiO2 and Al2O3 in the coal gangue are mixed with the high CaO in the slag to obtain the better alkali-activated binary coal gangue-slag materials [13,14]. ... However, in view of the alkali-activated mortar or concrete that can be used in the characterization, this means the mesoscopic level contains mercury intrusion method …
WhatsApp: +86 18221755073
Experimental Study on Preparation of Dry-Mixed Mortar …
The results show that the optimum content of hammer crushing of coal gangue through 3 mm sieve and cement is 83% and 17% of the total mass ( W/W ), …
WhatsApp: +86 18221755073
Rheology control of self-consolidating cement-tailings grout …
Reference 23 has studied the basic characteristics of coal gangue and its slurry, the resistance characteristics of slurry transportation, and the flow law in the goaf; A test system for long ...
WhatsApp: +86 18221755073
Processes | Free Full-Text | Activation of Low-Quality Coal Gangue
Although the calcination-based activation of coal gangue is important for its valorization in the form of cementitious materials, the related works mainly focus on high-quality coal gangue, neglecting its low-quality counterpart. To bridge this gap, we herein conducted the pilot-scale suspension calcination of low-quality coal gangue; explored …
WhatsApp: +86 18221755073
Road performance analysis of cement stabilized coal gangue …
The total shrinkage coefficient of cement stabilized coal gangue mixture with 4% cement dosage is 1.12 × 10 −2, which shows that the dry shrinkage resistance is the …
WhatsApp: +86 18221755073
Performance of cement-based materials containing calcined …
Meanwhile, the fluidity of cement mortar increases with the holding time as shown in Fig. 6 b. This is due to the water adsorption by the coal content or other organic component in calcined CG. The coal was combusted to different extents after calcination.
WhatsApp: +86 18221755073
Shrinkage-reducing measures and mechanisms analysis …
By using slag as a calcium source, high-strength alkali-activated coal gangue-slag (AACGS) cementitious material can be prepared. Given that higher drying shrinkage at room temperature is detrimental to the expanded engineering application of the material, this paper studies several methods for reducing drying shrinkage such as …
WhatsApp: +86 18221755073
Using Chinese Coal Gangue as an Ecological Aggregate and …
In addition, calcination of coal gangue as aggregate also has an important effect on concrete fluidity. When the coal gangue aggregate is calcined at 750 °C, with the delay of calcination time, the combustion loss of coal gangue increases while the fluidity of coal gangue aggregate concrete decreases (Figure 9 b). The surface carbon powder and ...
WhatsApp: +86 18221755073
Drying shrinkage behavior of geopolymer mortar based on kaolinitic coal
In order to reveal the influence of coal gangue aggregate activity on the mechanical properties of the mortar, to promote coal gangue fine aggregate in concrete mortar application, this paper in ...
WhatsApp: +86 18221755073
Comparative study on mechanical and environmental properties of coal
The coal gangue used in this study was sourced from the open-pit coal mine located in Fuxin City, Liaoning Province, China. Based on the standard of preparing structural concrete [16], the coal gangue with large size was crushed and sieved to obtain GS. Fig. 2 shows the granular distribution of the GS and NS as fine aggregates. From …
WhatsApp: +86 18221755073
An alternative approach to improve the compatibility of PCE in cement …
Coal fly ash (CFA) is the main combustion residue of fine ground coal in the process of coal-fired thermal power generation, and crude glycerol (CG) is the byproduct of biodiesel production.
WhatsApp: +86 18221755073
Preparation of coal gangue ceramsite high-strength …
Coal gangue can be processed into ceramsite concrete by the above method, which solves the problem of solid waste treatment and alleviates the shortage …
WhatsApp: +86 18221755073
Study on the performance of coal gangue ceramsite steel …
1. Introduction. Coal gangue (CG) is an industrial solid waste produced in the process of coal production. The global coal industry produces about 350 million tons of inactive coal gangue every year. 1.75 billion tons of coal gangue waste has been accumulated in landfills for decades in Europe [1, 2].At present, China's coal gangue has exceeded 7 …
WhatsApp: +86 18221755073
Preparation of Coal Gangue Cement Mortar | Semantic …
Many researches on coal gangue are aimed at increasing its activity by many methods together such as thermal, mechanical and chemical. The methods are so complex that they are difficult to be adopted by some companies. In this paper, considering the low-strength requirement of cement mortar, the activity of coal gangue is more evidently …
WhatsApp: +86 18221755073
- اسماء معلمات الناقلات في متوسطه اضم
- تهتز الموردين
- محطم بيع ألبرتا
- تستخدم معدات التعدين العارية كسارة الفك
- سحق صلابة تاكونيت الجرانيت
- رسم تخطيطي للكسارة الدورانية الفائقة
- طبل مبدأ فاصل الكهرباء الاحتكاك للعملية
- المنغنيز غسل معدات للبيع
- معدات منجم الحجر الجيري
- مجمع معالجة وإعادة التدوير المحدودة
- كسارة صنوبر في جزين بكاسين
- كسارات صغيرة الحجم في زامبيا
- بيع كسارة الفك كسارة المطرقة محطم
- كسارة الفحم مصنع سعر 100ton المملكة العربية السعودية
- شركة محجر مقاطعة ديلاوير
- جهاز البحث عن الذهب صناعة مصرية
- معلومات عن الطاحون
- ارتفاع سعر الاداء الذهب غسل السجاد لغسيل الذهب النبات
- نموذج وحدة كسارة العمل
- خطط تعويم الذهب
- صور الفك كسارة الركام الكلي
- أفريقيا السعر المستخدم
- تأثير رمح عمودي زينيت
- غولدستون التمهيدي محطم
- bridgeport for sale in uk 52 second hand
- casting hammer mill
- portable wash plant dealers in oregon
- crushing road roller
- m sand crusher machine manufacturer in tanzania
- crushers function pdf
- iron ore washer in south africa
- largest crusher companies
- coal size reduction ball mill
- limestone mill moisture in Oman
- mesto cursher machin photo
- Handbook Of Pharmaceutical Wet Granulation
- Brick Machine Sustainable Solutions
- coal briquettes machine
- Coal Crusher Pch 1016 220
- grinding unit in in cement plant in Mexico
- alignment test milling machine
- hydraulic briquette making machine
- cone crushers wiki
- gravel and sand in quezon provincefor sale
- stone crusher machine amp aggregate portable machine kenya
- ball mill for gold applications prices mc7dp
- screen vibrating steel in Mexico
- region malayalam miniging
- flourite proceesing china
- algeria small wheel mobile screen plant
- making machine chile stone crusher
- pakistani made ball mill feed machines in Mexico
- crusher in kore bing
- mining equipment jiading china
- rail car pusher for sale
منتجات
النشرة الإخبارية
LGH هي مؤسسة رائدة ورائدة مع المستوى الدولي الأكثر تقدمًا في البحث والتطوير.