high strength concrete. Manufactured sand has been widely used in highway construction in China. Zheng et al. [1] studied the preparation of C50 prefabricated T-beams with manufactured sand processed from granite in the tunnel, and showed that manufactured sand and gravel aggregates produced from granite can be used to …
Manufactured sand characteristics have a great influence on pavement performances of concrete. Increasing rock microfines amount to 20% will increase …
Influence of Stone Powder Content from Manufactured Sand Concrete on Shrinkage, Cracking, Compressive Strength, and Penetration. The market demand for manufactured sand has grown rapidly, and the solution to the problem of optimum stone powder content from manufactured sand concrete is imminent. The workability, early …
Effects of Fines Content on Durability of High-Strength Manufactured Sand Concrete. Manufactured sand is one of the effective ways to alleviate the …
The research results show that the SiO 2 content in tuff is as high as 55.45 %, making it a neutral alkaline stone with a compressive strength of 48.0 MPa. The Bangde ball milling work index and impact work index of tuff was 9.89KW/t and 6.45, respectively. ... the influence of manufactured sand on concrete performance has not considered the ...
This paper uses granite and limestone manufactured sand to study the effect of high fines content on the durability of high-strength manufactured sand concrete, and analyzes its influence ...
6. Pit Sand It serves as an excellent material for mortar or concrete work. Pit sand must be made free from clay and other organic materials before it can be used in mortar. A coating of oxide of iron over the sand grains should be removed. 7. RIVER SAND This sand is widely used for all purposes.
Section snippets Raw materials. Grade 42.5 ordinary silicate cement, crushed limestone in continuous grading 5–31.5 mm, and manufactured sand made of limestone with approximately 0–4.75 mm particle size were used in this test.The stone powder content, in mass of manufactured sand, was adjusted to 5%, 9% and 13%, where stone …
(Stefanidou, 2016; Li et al., 2011) have found that the effect of the roughness and angularity of crushed sand is significant on the enhancement of the bond between …
For sand having above 3.4% of clay content used in a 1:1: 2 (M-25) mix of concrete resulted in the production of concrete with compressive strength less than 25 N/mm2.Therefore, this work was conducted to investigate the amount of cement needed for sand samples with varying amount of clay/silt cement from 0% to 10% to produce …
The compressive pores in concrete with 100 % manufactured sand strength loss of the concrete continues to fall in the which reduces the permeability of acid solution replacement level 25%, 50%, 75% and lowest at through the concrete specimens. This acid solution was 33.3%, 31%, 28.6%, 27% respectively.
Ma [20] studied the influences of water-binder ratio, fly ash dosage, sand ratio and desert sand replacement ratio on the splitting tensile strength and uni-axial compressive strength of concrete. Yang [21] used desert sand from the Mu Us sandy land to make C60 high strength concrete and carried out the splitting tension and uni-axial ...
The performance of manufactured sand cement mortar and concrete containing flake particles of varying size and content was tested in this study. The influence law and the size and content of flake particles on the performance of mortar and concrete were analysed through the grey relational theory, the mechanism influence was …
Several authors have studied the effect of fineness modulus of sand on the properties of concrete. They showed that the Fineness Modulus of sand was among the principal factors affecting the ...
Natural sand is mainly excavated from river beds and always contains high percentages of inorganic materials, chlorides, sulphates, silt and clay that adversely affecting the …
Manufactured sand (MS) is widely considered as an alternative of the river sand (RS) recently, and to clarify the influence significance and influence mechanism …
The workability and compressive strength of high-strength geopolymer concrete have been carried out and the results shown in Figs. 5 and 6 as under. Workability of high-strength geopolymer concrete containing river sand is high as compared to high-strength manufactured sand concrete because the moisture …
The microstructure of manufactured sand ultra high strength concrete is very dense and the sizes of the hydration products e.g. ettringite, calcium hydroxide and monosulfate Calcium sulfoaluminate ...
9. High Performance Concrete(HPC) Possessing high workability, high durability and high ultimate strength. As per ACI, HPC is defined as a concrete meeting special combination of performance and uniformity requirements that cannot always be achieved routinely using conventional constituents and normal mixing, placing, and …
Manufactured Sand is produced by grinding the granite stone. It is also called as M-Sand or Robo Sand. Due to the toughness …
Saji MS, Leema Rose A (2015) Using glass waste as a partial replacement for fine aggregate on the strength of the concrete. Int J Eng Res Online 3(1): 96–99. Google Scholar Shanmugapriya T et al (2014) Influence of manufactured sand as fine aggregate on strength properties of high performance concrete. Int J Earth Sci Eng
The researchers' finding suggests, according to the outcome, that natural sand will replace M-sand in 50 percent, the compressive strength is increased by 5.7 percent and when 100 percent M-sand used in place of natural sand, strength improved by 7.03 percent, although the concrete in this situation becomes Very harsh in blending [5].
strength of high-capacity concrete prepared with a high-efficiency water reducer and a setting accelerator (SP103) based on component proportions. In …
The relation between methylene blue () value of MS and its limestone dust content and clay content was investigated. The effects of value ranging from 0.35 to 2.5 on the workability of fresh concrete and crack propagation characteristics at the age of 24 hours, and effects on the mechanical properties, dry shrinkage of the harden concrete …
However, M-sand with 0.15% polypropylene fibres has slightly improved the strength of self compacting concrete, compression strength by 6.97%, split tensile by 8.68% and flexure strength by 3%. Further, it has reduced the drying shrinkage by 40%, water absorption by 30%, water penetration by 33.33%, and increased the chemical …
In addition, different w/c ratios (0.29–0.38) were used to attain the ECC's high compressive strength at 3, 7, and 28 days. In connection to this, this study provides a better understanding of the influence of high cement content, different gradations of Msand, and w/c ratio on the ECC's compressive strength without SCM. 2. Research …
High Performance Lightweight Concrete (HPLC) has been extensively investigated for, among other applications, use in oil drilling platforms in severe environments. The relationships and allowable stresses and the stress block given in structural codes for normal strength concrete (e.g. IS 456 or IRC 21) will require modification.
In China, there are more than 87% of the global high-rises under construction, high-rise buildings have to be constructed using high strength concrete or ultra high strength concrete. The ultra high strength concrete refers to the concrete with the strength higher than 100 MPa according to the standard of China [19]. Shi et al. [20], …
Raw materials of MSC were the ordinary silicate cements, the admixture consisted of fly ash, slag and silica fume, the crushed stone and the manufactured sand. The cement' compressive strength and tensile strength at 28 days ranged in 35.5–63.4 MPa and 6.9–10.8 MPa, respectively. The maximum grain size of crushed stone ranged …
The influence of replacing M-sand with stone dust on mechanical attributes of high strength concrete are presented in this paper. Stone dust was incorporated in percentages varying from 0 to 40% ...
The results indicated that ultra-high strength concrete prepared with manufactured sand can have higher strength than concrete made with river sand. The permeability (e.g. water absorption and chloride penetration) of UHPC is also quite significant to the compressive strength, but there is little in-depth research on the …
This paper proposes a prediction of the compressive strength of concrete with manufactured sand (MS-concrete) based on an ensemble classification and regression tree (En_CART) method. A data set containing 1,350 original measured strengths of 328 concrete mixtures from actual engineering projects were used for …