العثور على الحق
We هي شركة ذات تقنية عالية تدمج البحث والتطوير والإنتاج والتوزيع ، وتوفر كسارة ، وصنع الرمال ، ومعدات طحن ، ومحطة تكسير متنقلة ، إلخ.
We هي شركة ذات تقنية عالية تدمج البحث والتطوير والإنتاج والتوزيع ، وتوفر كسارة ، وصنع الرمال ، ومعدات طحن ، ومحطة تكسير متنقلة ، إلخ.
2021/9/27 The concrete contains treated RCA with bacteria solution added to the mixing water, which can significantly improve the 28-day compressive strength, tensile splitting احصل على السعر
Aggregate crushing value % 40 % Water absorption % 6% Specific Gravity 2.48 4. RESULTS AND DISCUSSION The study discovered that replacement of 10 lateritic aggregate can احصل على السعر
6 Aggregate crushing value 20.19% 7 Bulk density of coarse aggregate (Poured density) Bulk density of coarse aggregate (Tapped density) 1687.31kg/m3 1935.3 kg/m3 4) Replacement of احصل على السعر
Idi et al. [89] stated that the optimum rate of partial substitution of coarse aggregate with PA in concrete is 5%, but the rate of substitution can be up to 15%. On the other hand, Singh [90 ...احصل على السعر
It can be seen from Table 4 that the differences in the mechanical properties of the different kinds of solid waste coarse aggregate concretes in this paper mainly came from the crushing value, احصل على السعر
tile aggregate as partial replacement of coarse aggregate in concrete production. 3. Comparison between combined flakiness and elongation index, mechanical properties (Aggregate crushing احصل على السعر
2021/8/31 1. Introduction. Large amounts of construction waste are being produced from China’s urbanization process .Waste concrete is the most suitable raw material for renewable احصل على السعر
Yiosese A. O., Ayoola A. R., Ugonna M. C., Adewale A. K. Abstract— The study reports on experimental investigation on the suitability of the use of broken tiles as partial replacement for احصل على السعر
2024/8/15 The utilization of recycled fine powder (RFP) from crushed concrete waste as partial cement replacement is limited by its low reactivity. Graphene Oxide (GO) is a two احصل على السعر
2024/10/2 Crusher run dust is a waste product produced in significant quantities during the removal and processing of rocks at crusher plants. This experiment examines how high-performance concrete ...احصل على السعر
2009/2/20 To solve the problem of high crushing value of granitic gneiss coarse aggregates, the effects of the crushing value on the compressive, flexural and splitting tensile strengths, and the elastic ...احصل على السعر
The slump test was used to assess the workability of the fresh concrete. The compressive strengths and densities of cured concrete cubes of sizes 150mm x 150mm x 150mm were evaluated at 7days, 21days and 28days. A total of 81 concrete cubes were cast and tested. Increase in the percentagereplacement of crushed granite with broken tilesاحصل على السعر
In this study, nano-SiO2 (NS) and basalt fiber (BF) were used to improve the quality of recycled aggregate concrete (RAC). The crushing value, water absorption, and apparent density of NS-modified ...احصل على السعر
2024/8/23 Due to the abundance of microcracks, voids, and a higher carbon content, coal gangue displays increased water absorption and crushing value, while also having a lower apparent density compared to natural aggregates [15], [16].These shortcomings lead to reduced durability and mechanical properties when coal gangue is employed as a concrete aggregate, احصل على السعر
3 Impact value 10.5 4 Water absorption 0.15% 5 Sieve analysis 20mm 6 Aggregate crushing value 20.19% 7 Bulk density of coarse aggregate (Poured density) Bulk density of coarse aggregate (Tapped density) 1687.31kg/m3 1935.3 kg/m3 4) Replacement of coarse aggregate:احصل على السعر
Aggregate Crushing Value Test - Aggregate Crushing values is a relative resistance of aggregates to crushing under gradually applied compressive load. ... Methods of Test for Aggregates for Concrete. Aggregate Crushing Value Apparatus. Aggregate Crushing Value Apparatus. A 15 cm dia. Steel ; cylinder with the plunger and base plate.احصل على السعر
Second, the inhibitory effect of PVA fibers on concrete shrinkage is better than those of FS and SRA, mainly because the fibers can improve the pore structure of the concrete at different scales and levels in three-dimensional space, refine the size of capillary pores, and improve the uniformity of the concrete, thus effectively preventing the ...احصل على السعر
2024/10/8 The theory for this is that the increased pozzolanic activity effectively fills in the concrete mixture's voids. Particles of scrap glass less than 4.75 mm can be used as a partial replacement for fine aggregate alternative. However, Research has indicated that the mechanical characteristics of concrete can be improved by adding glass trash to it.احصل على السعر
2023/12/1 Previous studies have shown that replacing NS with RS in cement mortar and concrete can reduce their working performance and mechanical strength [3], [4].Different tests were conducted to improve the performance of the recycled coarse aggregate concrete [5], [6], [7].Their results show that defects of recycled coarse aggregate concrete can be reduced or احصل على السعر
2.1. Physicochemical and Mechanical Properties of Different Solid Waste Coarse Aggregates. Firstly, the raw solid waste was prepared into different sizes of single-graded coarse aggregate by jaw crushing → screening, and other preparation processes, and then graded according to “Recycled Coarse Aggregate for Concrete” (GB/T25177-2010) and, finally, coarse aggregates احصل على السعر
2020/12/1 It can be considered that splitting tensile strength of concretes is consistent with aggregate crushing resistance. The contribution to sustaining stress by the coarse aggregate increases the strength of concrete the increase is proportional to the strength of the aggregate and the angularity of the aggregate grains (Fig. 11).احصل على السعر
Different techniques are applied to improve the qualities of RCA. ... water absorption and aggregate crushing value values of carbonized RCAs were decreased by 48.8%–49.3% and 9.7%–12.8% ...احصل على السعر
tile aggregate as partial replacement of coarse aggregate in concrete production. 3. Comparison between combined flakiness and elongation index, mechanical properties (Aggregate crushing value, Aggregate impact value, Aggregate abrasion value) of waste ceramic tile aggregate (CTA) and natural coarse aggregate (NCA). 4.احصل على السعر
2.1. Physicochemical and Mechanical Properties of Different Solid Waste Coarse Aggregates. Firstly, the raw solid waste was prepared into different sizes of single-graded coarse aggregate by jaw crushing → screening, and other preparation processes, and then graded according to “Recycled Coarse Aggregate for Concrete” (GB/T25177-2010) and, finally, coarse aggregates احصل على السعر
2020/12/1 It can be considered that splitting tensile strength of concretes is consistent with aggregate crushing resistance. The contribution to sustaining stress by the coarse aggregate increases the strength of concrete the increase is proportional to the strength of the aggregate and the angularity of the aggregate grains (Fig. 11).احصل على السعر
Different techniques are applied to improve the qualities of RCA. ... water absorption and aggregate crushing value values of carbonized RCAs were decreased by 48.8%–49.3% and 9.7%–12.8% ...احصل على السعر
tile aggregate as partial replacement of coarse aggregate in concrete production. 3. Comparison between combined flakiness and elongation index, mechanical properties (Aggregate crushing value, Aggregate impact value, Aggregate abrasion value) of waste ceramic tile aggregate (CTA) and natural coarse aggregate (NCA). 4.احصل على السعر
2020/3/21 The world is intensively attempting to solve concrete waste recycling and re-usage problems. Concrete waste can be used as an aggregate in newly mixed concrete production [1]. Many researchers ...احصل على السعر
2016/2/1 Experimental investigations have been carried out on the use of cockle seashell as aggregate replacement materials in concrete. Seashells were utilised as partial coarse aggregates in concrete ...احصل على السعر
2018/6/20 Coarse RCA is obtained mainly by screening, crushing and sieving of waste concrete. The properties of coarse RCA is different from natural coarse aggregate (NCA) due to the old attached cement mortar, resulting in higher water absorption, lower strength, and higher crushing value [2], [3], [4], [5].The properties of coarse RCA can be significantly improved by احصل على السعر
Partial label learning is a practical paradigm for dealing with noisy data and has been widely investigated. Existing partial label learning methods are classified into two main strategies: disambiguation-based and disambiguation-free. The disambiguation-free methods ingeniously extend existing techniques to deal with the PL problem.احصل على السعر
Use of stone dust in concrete not only improve the quality of concrete but also conserve the natural ... 30%, 40%, 50% 60%. For the different grades of concrete studied, the value of the compressive strength are observed to be maximum at 30% replacement level of sand. ... This investigation proves that quarry dust can be used as a partial ...احصل على السعر
2024/6/1 The particle size distribution and particle morphology of fly ash are two important physical factors affecting its mechanical performance in cement and concrete: 1) The fineness of fly ash decreases, the particle size distribution is uniform, and the specific surface area increases, which can improve the reaction degree of fly ash and refine ...احصل على السعر
The crushing value, water absorption and apparent density of RCA after soaking modification in NS solution are shown in Table 2 and Fig. 2. The crushing value of RCA decreased relatively significantly when the concentration of NS increased from 1% to 2%. For example, the crushing value decreased from 17.5% to 16.8% at 5 h.احصل على السعر
2024/9/1 Based on the heat transfer principle in solids [4, 6], reducing inherent defects, impurities, and boundaries within a material structure constitutes an effective strategy to enhance the thermal conductivity.Within this frame, the thermal conductivity of concrete can be improved from two aspects: (1) minimizing defects and impurities of the raw materials for concrete, احصل على السعر
2022/4/20 In many regions in the world, temperature varies above and below 0 °C throughout the year. In these regions, concrete is susceptible to the damage caused by freeze–thaw cycles (Bogas et al., 2016; Huda and Shahria Alam, 2015), adversely affecting the safety, serviceability, and durability of concrete structures (Zhao et al., 2021).Traditional احصل على السعر
2024/10/15 A huge number of research works have been conducted on the utilization of RCA in both structural and non-structural concrete production and those studies indicated that RAC can show enough performance and the researchers have recommended the using of recycled aggregates to a certain amount in replacement of virgin aggregates in concrete [11, احصل على السعر
