Influence of stone powder content in machine-made sand on mortar concrete
The paper mainly studies that Influence of stone powder content in machine-made sand on mortar concrete. By changing the amount of stone powder in the machine-made sand, the ratio of cement to ...
A Guide to How Concrete is Made
For a large construction task requiring lots of concrete, machine mixing is often necessary. However, for a smaller, do-it-yourself project with flexible timeframes, hand mixing might work just fine. Curing Concrete. Curing is an essential step in concrete production. It influences the final strength and durability of the concrete.
Effects of Polypropylene Fibers on the Frost Resistance of Natural Sand
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 ...
Orthogonal Experimental Study on Concrete Properties …
were used to investigate the performance of machine-made tuff sand concrete. The optimal concrete mix ratio of machine-made sand was obtained by orthogonal test and its working performance was ...
Study on Simulation Test of Mass Machine-Made Sand …
In this paper, the temperature field during the pouring process of machine-made sand concrete is numerically simulated, and the variation law of the temperature field with …
Strength and Durability Characteristics of Concrete Using Manufactured Sand
The physical properties of naturally occurring river sand and man-made sand should be compared (M-sand). The current study focused on the M30, M40, and M50 mixtures. ... pulverized used foundry sand is better in acid resistance than ordinary concrete without pulverized used foundry sand. ... otherwise called graded to as a construction material ...
Experimental Study on Freeze-Thaw Resistance of Concrete …
The replacing products especially the machine-made sand successively occupied the sand markets [1]. However, as the design codes for concrete structures were made on the basis of ordinary concrete ...
Evaluation of Relations among Basic Mechanical Properties of Concrete …
Due to many different characteristics such as irregular polygon particle with pointed edges, rough surface and larger content of stone powder, machine-made sand has ignorable effects on the properties of concrete. As the basis for the design of concrete structures, the relations among the basic mechanical properties of concrete such as compressive strength, tensile strength, …
Comparative Studies of Dynamic Mechanical Properties of Desert Sand
Detailedly, the ordinary concrete is totally destroyed when impact velocity is 10 m/s, but the desert sand concrete still maintains the cone shape at impact velocity of 18 m/s, which indicates ...
Effect of Stone Powder Content on Mechanical …
The modulus of elasticity of the concrete with stone powder was predicted by a three-phase composite model. The results show that with the increase of stone powder content, the slump …
Comparison of Compressive Strength Value of Concrete Using Pumice Sand
The test objects made were tested for compressive strength. There were 6 test objects made in this study with a size of 15 cm x 30 cm. In detail, 3 test objects were made of pumice sand, while the other 3 test objects were made of ordinary sand. The coarse aggregate for all test objects was crushed stone.
Concrete Compressive Strength Testing Machine
Concrete Compression Testing Machine. A concrete compression testing machine is an apparatus that applies compressive force to concrete specimens. This force is applied gradually until the specimen fails and the maximum load is recorded. The maximum load is then used to calculate the compressive strength of the concrete. Components
Research on the Performance of Manufactured Sand …
The working performance and durability of medium and low strength machine-made sand concrete with different stone powder contents were studied, and the optimal range of stone powder content ...
Ordinary Portland Cement Concrete: The Essential Guide for …
Ordinary Portland Cement (OPC) concrete is your go-to material for countless construction projects. It's made from cement, water, sand, and gravel, and it stands out for its strength, durability, and versatility. You'll find it in important …
Slump in Concrete: The Key to Quality and Workability
Understanding concrete slump is vital for anyone involved in the construction industry. Concrete slump reflects the consistency of a concrete mix and influences its workability, impacting the final quality of your build. Our guide delves into measuring slump with the slump test, interpreting its value, and troubleshooting common issues to ensure your …
Research on Rebound Strength Measurement Curve of …
In order to investigate the influence of carbonation treatment on the rebound strength measurement curve of machine-made sand concrete, this study conducted research on the carbonation mechanism sand concrete rebound strength measurement curve through rebound and compressive strength tests using carbonation degree and concrete strength …
Analysis of damage models and mechanisms of mechanical sand concrete …
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 multiple indicators such …
Study on Durability of Concrete with Machine-Made Sand …
Three strength grades of concrete C30, C40 and C50, and the contents of stone powder in machine-made sand of 5%, 9% and 13% in mass were considered in the mix proportion of concrete with machine-made sand. The ordinary concrete with natural river sand in the same strength grade was tested at the same time for comparison.
A Review of Mechanical Properties of Ordinary …
machine-made sand substitution rate showed the maximum compressive strength loss rate. Wang Weiwei et al. [4] studied the change law of mass loss and compressive strength of concrete with different iron tailings sand content after high temperature, and the results
Experimental study on tensile strength development of …
The MSC cubes were tested by the splitting tensile method, the influences that the water-cement ratio and the stone powder content have on the tensile strength development of …
Study on the Resistance of Concrete to High-Concentration …
The fine aggregate used was machine-made sand from Chongzhou, with an apparent density of 2630 kg/m 3, a bulk density of 1640 kg/m 3, a fineness modulus of 2.9, and a stone powder content of 5.0%. For coarse aggregate, Chongzhou crushed stone with a continuous gradation of 5–25 mm was utilized, with an apparent density of 2660 kg/m 3, a …
6 Tips to Produce High-quality Machine-made Sand
The content of needle flakes in machine-made sand is most sensitive to the crushing index value. The crushing index value of machine-made sand is generally above 30%, or even higher. For mixing ordinary concrete, machine-made sand …
Experimental Study on River Sand Replacement in …
are obvious differences between machine-made sand and natural river sand. So, there are some problems in the performance of concrete prepared with machine-made sand. At present, the machine-made sand is often mixed with natural river …
Several Misunderstandings Of Machine-made Sand To Prepare Concrete?
Several Misunderstandings Of Machine-made Sand To Prepare Concrete? - Oct 01, 2022-1 Characteristics of machine-made sand. According to GB/T 14684-2011 "Sand for Construction", artificial sand (artificial sand) does not include soft and weathered particles, but refers to the particle size not exceeding 4.75mm, which has undergone soil removal treatment, mechanical …
Preparation and Performance Study of Radiation-Proof Ultra …
With the continuous development of nuclear technology, it is necessary to urgently solve the nuclear safety problem. γ-rays have a strong penetrating power. The γ-ray-shielding performance of ordinary concrete prepared with natural sand is weak and cannot meet the practical application of engineering. The γ-ray shielding performance of concrete can be …
Influence of Machine-Made Sand Performance on …
This paper mainly studies the influence of various performance indexes of machine-made sand on the adaptability of polycarboxylic acid and the work performance of concrete, which …
(PDF) Study on Durability of Concrete with Machine-Made Sand …
Three strength grades of concrete C30, C40 and C50, and the contents of stone powder in machine-made sand of 5%, 9% and 13% in mass were considered in the mix proportion of concrete with machine ...
Durability performance of self‐compacting concrete made …
The utilization of waste foundry sand (WFS) has been widely explored in conventional concrete to evaluate strength and durability properties. In this study, durability properties of self-compacting c...
Test Methods for Concrete Durability Indicators | Request …
Semi-destructive concrete exposure methods were used to determine resistance parameters: the impact echo test to determine internal structure, the Figg test for air permeability, the initial ...
Comparative Studies of Dynamic Mechanical Properties …
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