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A study of the quantitative relationship between water
There exists an optimum sand to aggregate (S/A) ratio in concrete, which is influenced by a variety of factors. In order to study the functional relationship between water consumption and the optimum S/A ratio, taking the concrete with water-cement ratio of 0.50 as the research object, احصل على السعر
Estimation of compressive strength of concrete with manufactured
2024/12/1 LIME analysis indicates that when the stone powder content in MS ranges from 5–10 %, the recommended dosage range for concrete with a strength of 50–60 MPa is as احصل على السعر
Mechanical properties and microstructure of artificial sand
2024/7/1 They found that using the same amount of cement, water, and sand, but with different types of sand, namely natural medium sand, natural fine sand, and artificial sand احصل على السعر
Estimation of Soil Water Characteristic Curves (SWCC) of mining
2019/5/29 Soil water characteristic curve (SWCC) is widely known as the relationship between matric suction and water content. It is used as a tool to determine the hydraulic and احصل على السعر
Workability Tests and Rheological Properties of Manufactured
2024/5/25 Chen et al. determined that the wet shotcrete exhibited excellent fluidity and mechanical qualities when the fine aggregate had a sand ratio of 0.56 and a water content of احصل على السعر
Technical Application of Machine-made Sand in the Production of
2021/1/27 mud content less than 0.4%); Machine-made sand(S2, machine-made sand with fineness modulus of 2.71 and stone powder content of 5%); Gravel (G, the grain size of 10-20 احصل على السعر
Influence of Aeolian Sand on Capillary Water Absorption of
3.2.1 Cumulative Water Content. The CWA process of porous materials, such as concrete, can be described by Darcy's Law and its absorption water capacity can be characterized by the CWA احصل على السعر
Strength Assessment of Water–Glass Sand Mixtures - MDPI
2023/10/27 The coefficients of variation in wet density and water content are 0.5 and 2.2%, respectively. Hydrogel existed in the pores of the sand-gel specimens. As hydrogel comprises احصل على السعر
Influence of Machine-Made Sand Performance on Concrete
2021/1/1 The fine coefficient is one of the physical properties of the fine aggregate. The fineness modulus (FM) is obtained by adding the total percentage of sand retained on each احصل على السعر
Particle Characterization of Manufactured Sand and Its Influence
2022/6/30 However, due to its irregular shape, rough surface, highly elongated and flaky particle content, poor gradation, and high stone powder (SP, particle size < 0.075 mm) احصل على السعر
Research on the influence of machine-made sand gradation
Research on the influence of machine-made sand gradation ... gradation and fineness of machine-made sand are explored. The relationship between modulus and mortar fluidity, yield stress and plastic viscosity. ... water (g)=450:1350:270. The machine-made sand is adjusted to different gradations. The cumulative sieving rate and fineness modulus ofاحصل على السعر
The Influence of Iron Tailings Powder on the Properties
2023/5/18 Iron tailings powder (ITP) is a kind of solid waste, which pollutes the environment, without any treatment. The application of ITP in cement concrete is a good choice. In this study, the influence of ITP on the flowability, احصل على السعر
Estimation of compressive strength of concrete with manufactured sand
2024/12/1 LIME analysis indicates that when the stone powder content in MS ranges from 5–10 %, the recommended dosage range for concrete with a strength of 50–60 MPa is as follows: water content should be less than or equal to 150 kg/m³, manufactured sand content should range from 663.5 kg/m³ to 721.05 kg/m³, cement content should be between 357 ...احصل على السعر
Research on the influence of machine-made sand gradation and
The gradation and fineness modulus of machine-made sand are important factors affecting the performance of mortar. By studying the influence of different machine-made sand gradation and fineness modulus on the workability and rheological properties of mortar, the gradation and fineness of machine-made sand are explored. The relationship between modulus and mortar احصل على السعر
The relationship between the shear strength and water
2021/9/1 Water retention curve (WRC), which is a measure of water holding capacity in soil when subjected to various suctions, defines the relationship between the amount of water (i.e., gravimetric water ...احصل على السعر
Gradation optimization of continuous-graded crushed sand based
2022/12/5 Discussion on the relationship between workability and rheological parameters of mortar. ... The effects of fines content (FC) and sand gradation on small strain shear modulus G 0 are analyzed from the experimental ... Compactness and hardened properties of machine-made sand mortar with aggregate micro fines. Construction and Building Materials ...احصل على السعر
Effect of Water Content on Tensile Properties of Cement
2020/9/8 Group Cement Water Sand Water cement ratio MS1 335 609.1 1218.2 0.55 MS2 291.9 648.6 1297.2 0.45 2.2. Preparation of test pieces According to the mixing ratio in Table 1, the material is poured into the mixer in the order of sand-water-cement, and poured uniformly after being stirred, and then the mortar is loaded into the “8” shapeاحصل على السعر
Research on the Relationship between Sodium Bicarbonate Content
In this paper, we first defined and theoretically analyzed the “over-gassing” mechanism of CO2 hardening sodium silicate sand. “Over-gassing” is a term adopted to express the excess of CO2 agent beyond what is required to adequately cure the core that leads to the potential increase in NaHCO3. The final strength loss rate of CO2 sodium silicate sand is higher than 20%. As احصل على السعر
Experimental study on tensile strength development of concrete
2017/5/1 Manufactured sand crushed from stone or gravel, also known as machine-made sand, ... [14], and the basic mechanical properties, the volume stability and the durability ... which was affected by the amount of stone powder in manufactured sand and the water-cement ratio. The content of stone powder up to 13% was beneficial to the tensile strength ...احصل على السعر
The Influence of Iron Tailings Powder on the Properties on the ...
2023/5/18 Dolomite rock powder (the waste stone residue in the production of machine-made sand and stone processing) and iron tailings powder formed by mineral processing industry are solid wastes, which ...احصل على السعر
Estimating the Thermal Conductivity of Unsaturated Sand - MDPI
2024/4/25 A modified parallel model for estimating the thermal conductivity of unsaturated sand was proposed in this study. The heat conduction in the solid phase of sand depends mainly on the form of contacts between solid particles, while water bridges at the particle contacts increase the contact areas and remarkably enlarge the transfer paths of heat conduction in احصل على السعر
Research on the influence of machine-made sand gradation and
2021/4/1 [1] Zhu J.L., Lang X.G. and Jia X.E. 2001 Production status and development of machine-made sand[J] Mining and Metallurgy 38-42 Google Scholar [2] Qiu H.Q. 2015 The influence of machine-made sand particle shape and stone powder content on concrete performance[D] (Shenzhen University) Google Scholar [3] Ai C.F., Peng H. and Hu C. 2013 احصل على السعر
Compactness and hardened properties of machine-made sand
2020/7/30 Type I ordinary Portland cement was used with a specific surface area of 362 m 2 /kg, the properties and oxide compositions of cement were shown in Table 1, Table 2.Both AMF and MS were made from limestone. The XRD pattern of AMF was shown in Fig. 1, and the specific surface area was 353 m 2 /kg. MS had a fineness modulus of 2.93, and its physical احصل على السعر
Research on carbon emission reduction of manufactured sand
2023/11/3 It can be seen from the calculation that the carbon emission factor of machine-made sand reaches 7.651 kgCO 2 /kg. The research results of many researchers on the carbon emission factor of natural sand are about 6.6 kgCO 2 /kg. Therefore, the mining process of machine-made sand needs to be improved.احصل على السعر
Estimating the Thermal Conductivity of Unsaturated
2024/4/25 A modified parallel model for estimating the thermal conductivity of unsaturated sand was proposed in this study. The heat conduction in the solid phase of sand depends mainly on the form of contacts between solid particles, احصل على السعر
Research on the influence of machine-made sand gradation and
2021/4/1 [1] Zhu J.L., Lang X.G. and Jia X.E. 2001 Production status and development of machine-made sand[J] Mining and Metallurgy 38-42 Google Scholar [2] Qiu H.Q. 2015 The influence of machine-made sand particle shape and stone powder content on concrete performance[D] (Shenzhen University) Google Scholar [3] Ai C.F., Peng H. and Hu C. 2013 احصل على السعر
Compactness and hardened properties of machine-made sand
2020/7/30 Type I ordinary Portland cement was used with a specific surface area of 362 m 2 /kg, the properties and oxide compositions of cement were shown in Table 1, Table 2.Both AMF and MS were made from limestone. The XRD pattern of AMF was shown in Fig. 1, and the specific surface area was 353 m 2 /kg. MS had a fineness modulus of 2.93, and its physical احصل على السعر
Research on carbon emission reduction of manufactured sand
2023/11/3 It can be seen from the calculation that the carbon emission factor of machine-made sand reaches 7.651 kgCO 2 /kg. The research results of many researchers on the carbon emission factor of natural sand are about 6.6 kgCO 2 /kg. Therefore, the mining process of machine-made sand needs to be improved.احصل على السعر
Effects of Polypropylene Fibers on the Frost Resistance of Natural Sand
Multi-angled machine-made sand requires more water to achieve the same working performance, but the compressive strength of the concrete is lower than that of regular concrete. ... When the volume content of PPF is constant, the relative split tensile strengths of the concrete specimens gradually decrease with the increase in the number of ...احصل على السعر
Pore structure evolution of mortars with manufactured sand
Since the relationship between the porosity of MF pores and the total porosity is Ф M =Ф*S M, the calculation method of permeability K in Eq. (6) can be further simplified to an expression characterized by Ф M as shown in Eq. (7). The relationship between K and Ф M under different saturation service time is shown in Fig. 12 c. (7) K = A Φ ...احصل على السعر
The Relationship of Compressive Strength and Chemically Bound Water
2021/10/21 Fly ash (FA) has been widely used in cement-based materials, but limited work has been conducted to establish the relationship between the compressive strength and hydration process of high-volume FA (HVFA)-cement-based material. In this study, the compressive strength and chemically bound water contents of FA-cement-based materials with different احصل على السعر
Sand Dams for Sustainable Water Management: Challenges and
2022/1/1 31 Sand dams are impermeable water harvesting structures built to collect and store water within 32 the volume of sediments transported by ephemeral rivers. The artificial sandy aquifer created byاحصل على السعر
(PDF) Effect of sand content on strength and pore ... - ResearchGate
2017/4/1 For this purpose, SHMSHCs utilizing microsilica sand and river sand with a median particle size of 0.18 mm and 1.10 mm, at varying sand-to-MgO weight ratios from 0 to 1.60, were experimentally ...احصل على السعر
A optimum prediction model of chloride ion diffusion coefficient
2024/1/12 Compared with natural sand, there are significant differences in particle size, grading and particle content below 0.075 mm [8]. These factors lead to some differences in the durability of concrete made from mechanism sand and natural sand [9].احصل على السعر
Study on the mechanical properties and pore structure of desert sand
2022/12/1 Water-binder ratio and sand ratio were 0.4 and 0.3, respectively. The water-reducing agent content was 0.4% total cementitious material. Fly ash with the content of 10% and 20% was used to replace cement. With the same content of fly ash, desert sand with DSRR of 0%, 20%, 40%, 60%, 80% and 100% was used to replace medium sand to prepare DSC ...احصل على السعر
Material and structural properties of recycled coarse aggregate ...
2024/6/15 The emissions of construction and demolition (CD) waste have been increasing worldwide in recent years. As shown in Fig. 1, China alone had over 3 billion tonnes of untreated CD waste in 2020 [1].To promote sustainability in the construction industry, one technique that has been extensively explored is the use of recycled aggregates derived from احصل على السعر
A Review of Sand–Clay Mixture and Soil–Structure Interface
Natural soils are usually heterogeneous and characterized with complex microstructures. Sand–clay mixtures are often used as simplified soils to investigate the mechanical properties of soils with various compositions (from clayey to sandy soils) in the laboratory. Performing laboratory tests on a sand–clay mixture with definite clay fraction can provide information to احصل على السعر
A optimum prediction model of chloride ion diffusion coefficient
2024/1/12 The chloride ion diffusion coefficient (CIDC) is an important index to evaluate the durability performance of machined sand concrete. In this study, a database of CIDC is established for 82 sets of experimental data for 4 influence parameters. Meanwhile, different models with 4 input variables (Water to binder ratio, fly ash ratio, relative humidity and احصل على السعر
- الفك محطم ليبيا
- كسارة الفك التجمع الفيديو
- استفسار عن كسارة الحجر المورد
- ارتجال معدات التعدين رمل السيليكا
- كومة جوشوا آلة طحن رمح
- طاحونة الكرة تحديث محطة توليد الطاقة في المملكة المتحدة
- جودة عالية الولايات المتحدة الأمريكية تكسير الحجارة سعر الجهاز مع ايزو م
- ماليزيا الذهب معدات التعدين
- لكامل آلة تكسير الحجارة تجربة
- كسارة مطبعة مربعة
- معدات التعدين الحد من حجم البوتاس
- كسارة على أبواب الختم جيدة
- الشركة المصنعة كسارة حجر في تاميل نادو
- مجفف تنفيس أنابيب قطرها
- التجفيف في تكنولوجيا معالجة المعادن
- من الهيماتيت ناقل
- تدريب الكسارة اليدوية
- المحمول كسارة الصخور المحددة
- مطحنة تتحرك الموزعين
- كسارة المستخدم والغسالة في