Orthogonal Experimental Study on Concrete …
The mechanical and working properties of the machine-made sand concrete reach the optimum condition when the mineral admixture is 20%, the sand rate is 46%, the stone powder content is …
The mechanical and working properties of the machine-made sand concrete reach the optimum condition when the mineral admixture is 20%, the sand rate is 46%, the stone powder content is …
In this research, the fracture characteristics of crushed limestone sand concrete were experimentally investigated through a wedge splitting test, and the results were compared with those of ...
Manufactured sand crushed from stone or gravel, also known as machine-made sand, artificial sand or crushed-stone sand, has been used as a substitute of natural sand in concrete [1], [2], [3]. This is also becoming a global trend to produce concrete by using manufactured sand in the safeguarding of limited natural sand resources [4], [5], …
The mechanical and working properties of the machine-made sand concrete reach the optimum condition when the mineral admixture is 20%, the sand rate is 46%, the stone powder content is 10% and the water–cement ratio is 0.30. ... Felekoglu compared washed river sand, washed machine-made limestone sand, machine …
The fiber-bridging characteristics determined through SCTT showed that compared to the control mixture with river sand, complementary energy (J b ') was negatively affected by the inclusion of M-sand in the matrix due to decreased interfacial friction between fiber-matrix.
The cost of crushed stone sand is relatively low compared to other conventional materials. The price of M-sand ranges from Rs. 500 per ton as compared to natural sand which is Rs. 830 per ton. Crushed stone sand use less water than other alternatives and have excellent load bearing capabilities and durability.
Mechanical sand concrete (MSC) deterioration in bridge engineering within cold-salt environments in the West was investigated. This study evaluated the salt-freezing resistance and damage models of granite mechanical sand concrete (GMSC) and tuff mechanical sand concrete (TMSC) under composite salt freezing-thaw cycles, using …
To enhance the application of machine-made sand (MMS) concrete in engineering, some performances of C30 ordinary concrete and MMS concrete are researched in this paper. ... is 4.9% and 5.7% lower ...
This study compared the physical and mechanical properties of river sand concrete with quarry dust concrete. The constituent materials were batched by weight.
The edges and corners of the machine-made sand produced by the sand and gravel equipment are relatively sharp. The firmness of machine-made sand is slightly worse than that of river sand, but it ...
Sand washing machine to ensure 0% silt content, benefitting best economized concrete with possibility of reduction in cement content ... The present investigation shows that characteristics of concrete made …
ified in Table 2 below, the machine-made sand concrete must be removed. The demold-ing time is significantly shorter for machine-made sand concrete compared to river sand concrete. The removed machine-made sand concrete should not be used in the molds of subsequent pours, and it should not be mixed with newly mixed machine-made sand …
Whereas the high-grade natural river sand (RS) gradually decreased in more and more areas in China, the market share of manufactured sand (MS) keeps …
Sources of Construction Sand **1. River Sand. River sand is one of the most common sources of construction sand and is gathered from riverbeds and riverbanks.. Characteristics: River sand is typically well-rounded and has a smooth texture due to natural erosion by water.This makes it ideal for use in concrete and mortar. Extraction …
Machine-made sand is a kind of artificial sand obtained by processing granite, pebbles, limestone, etc. through crushers, sand making machines, and sand washing machines. This article is about feature of …
Raw materials of machine-made sand. Granite, basalt, river pebble, cobble, andesite, rhyolite, diabase, diorite, sandstone, limestone and other varieties are usually used as sand making raw ...
In order to study the effect of polypropylene fibers on the frost resistance of natural sand and machine-made sand concrete, polypropylene fibers (PPF) of different volumes and lengths were mixed into natural sand and machine-made sand concrete, respectively. The freeze–thaw cycle test was carried out on polypropylene-fiber …
Compared with ordinary river sand, artificial sand itself contains a small ... machine-made sand in two comparison of processes. ... Influence of machine-made sand characteristics on concrete ...
Compared with river sand, manufactured sand exhibits an inferior particle shape and gradation and the presence of stone powder. Based on the Bingham model, Westerholm [1] studied the influence of the shape of manufactured sand particles on the rheological properties of mortar. The results indicated that shape had a significant …
River sand is dug directly from the river and is mixed with pebbles and fine sand. These pebbles have been washed by the river for a long time, and the edges and corners are relatively round. 2. Robustness and …
With the basic continuous improvement of China's infrastructure, the demand for concrete is increasing day by day. Sand is an important component of concrete, its characteristics have an ...
The erosion depth in mixed sand concrete has a growth rate that is 0.027 mm/d lower compared to ordinary river sand concrete under erosion conditions. ... Prior studies …
Compared with natural river sand, the grain gradation of machine-made sand is slightly worse, larger than 2.5 mm and less than 0.08 mm. Too many particles result in poor workability of the concrete and easily cause defects in the appearance of concrete.
This results in stronger mechanical occlusion force between MS particles compared to those found with river sand, ... Effects of fiber properties on flexural and fracture characteristics of manufactured sand concrete based on acoustic emission ... Study on mechanical properties and carbon emissions of desert sand and …
Traditional natural river sand is used as a fine aggregate for concrete, but due to the severe environmental situation in recent years, many places have asked for a ban or restriction on the extraction of …
In Figure 4 b, the trend of relative plastic viscosity of manufactured sand concrete and natural river sand concrete with time as a whole shows an increase and then decrease, but the increase and decrease in relative plastic viscosity of mechanism sand concrete is significantly earlier than that of natural sand concrete in time.
The machine-made sand is the sand and gravel material obtained after crushing by suitable crushers and other professional sand making equipment. Compared with natural river sand, it has the characteristics of sharp edges and sharp edges and many needles and flakes. Distinguish machine-made sand and river sand from the …
This paper conducted a series of experimental studies to provide an in-depth dynamic compressive properties of seawater sea-sand concrete (SSMC30) and freshwater river-sand concrete (NC30). The main conclusions of this study can be summarized as follows: (1) The failure process and pattern of SSMC30 and NC30 are very similar.
Materials 2022, 15, 3516 2 of 18 There are many methods for designing the proportioning of machine-made sand con-crete, and different proportioning methods have their own focus [5,6].
So, it is urgent to replace river sand with energy saving materials, machine-made sand and superfine Yangtze River sand. Based on the determination of two …
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