Stone dust is a waste material obtained from crusher plants. It has potential to be used as partial replacement of natural river sand in concrete.
Effect of Replacement of Natural Sand by Grit on ... TABLE VI: WORKABILITY OF CONCRETE % of Stone Dust in Concrete % Dose of Super Plasticizer by Weight of Cement Moderate Slump Value (in mm) 0 0.6 65 10 0.7 70 20 0.8 60 30 0.9 54 40 1.1 60 50 1.3 52 60 1.45 55 70 1.6 58 80 1.7 51 B. Density: The density of fresh concrete is slightly greater than the density of harden concrete.
Abstract- Stone dust is a waste material obtained from crusher plants. It has potential to be used as partial replacement of natural river sand in concrete. Use of stone dust in concrete not only improve the quality of concrete but also conserve the natural river sand for future generations. In the present
Effect of Superplasticizers on Workability of Fresh Concrete
The results indicate that polycarboxylate superplasticizer mixed in mortar increases with stone dust mixed because of large specific surface and water demand of stone dust. There is little effect on fluidity loss when the dosage of stone dust is below 18%, and it …
Jul 01, 1996· Crusher dust is a fine material formed during the process of comminution of rock into crushed stone or crushed sand. This dust is composed by particles which pass 75 μm BS sieve. Effects of dust content in aggregate on properties of fresh and hardened concrete are not known very well.
Alsadey [4] performed an investigation to study effects of super plasticizer dosage on concrete and to get the best dose of super plasticizer that achieve the better strength and workability, in ...
replacement level of stone dust casted on 1 - 1.5% dose of super plasticizer with slump vale of 25 – which can be maintained by extra dose of 35 mm. Finally it can be stated that the stone dust is to be used in concrete with partially or fully replacement of fine aggregate. TABLE 4. Compressive Strength of Concrete Concrete Cube Group
The results indicate that polycarboxylate superplasticizer mixed in mortar increases with stone dust mixed because of large specific surface and water demand of stone dust. There is little effect on fluidity loss when the dosage of stone dust is below 18%, and it …
superplasticizer will have positive effects on properties of concrete, both in the fresh and hardened states (4). In the fresh state, utilization of superplasticizer will normally reduce tendency to bleeding due to the reduction in water/ cement ratio or water content of concrete. However, if water/
[Show full abstract] effect of partial replacement of natural sand with stone dust in concrete. Experimental programme was conducted using 30%, 40%, …
Equivalent mixes are obtained by replacing stone dust partially/fully. Test results indicate effective usage of stone dust with same compressive strength, comparable tensile strength and modulus of rupture. Workability of 40% replacement of stone dust with 2% Superplasticizer is equal to the workability of conventional concrete. Workability is
Jan 01, 2015· Figure 4 illustrates the experimental results. The greatest compressive strength gain, 10.4% relative to the ordinary concrete, was noted for the concrete with the mineral dust and that with the mineral dust and polymer fibres. The compressive strength value is primarily dependent on the amount of the mineral dust admixture added to the concrete.
Abstract- Stone dust is a waste material obtained from crusher plants. It has potential to be used as partial replacement of natural river sand in concrete. Use of stone dust in concrete not only improve the quality of concrete but also conserve the natural river sand for future generations. In the present
Effects of different chemical admixtures on fresh and hardened properties of prolonged mixed concrete and their cost-effectiveness were investigated. Influence of sand to aggregate volume ratio, cement content, and use of chilled mixing water on the properties of prolonged mixed concrete was studied as well. Different concrete mixtures were prepared using five different types of chemical ...
Chemical admixtures are added to concrete in very small amounts mainly for air entrainment, reduction of water or cement content, plasticizing of fresh concrete mixtures or to control the setting time of concrete. These admixtures can be broadly catagorised as superplasticizers, accelerators, retarders, water reducers and air entraining admixtures.
effects on concrete, if the natural sand replaced by quarry dust. To find the effect of quarry dust various tests are conducted like compressive strength test and workability test (compaction factor). The set of series are, M20 & M25 grade of concrete with 10, 20, 30, 40, 50 and 60 percentage
the concrete that it increases the crack resistance, ductility, energy absorption or toughness of concrete. Thus, this paper addresses the results of change of Stone dust and Steel fiber on the strength properties of concrete. The replacements are done at 0%, (30%, 1%), (40%, 1%), (50%, 1%) of fine aggregate with Stone dust and addition
effect of water cement ratio, dosage of superplasticizer, and characteristics of fine aggregate on flow behavior of cement mortar. For each water cement ratio, optimum dosage of superplasticizer (ODS) found has out.Six different dosages of superplasticizer were taken to study the effect of superplasticizer on
The concept of replacement of natural fine aggregate by quarry dust which is highlighted in the study could boost the consumption of quarry dust generated from quarries. By replacement of quarry dust, the requirement of land fill area can be reduced and can also solve the problem of natural sand scarcity. The availability of sand at low cost as a fine aggregate in concrete is not suitable and ...
The replacement of fine aggregate with stone dust gives beneficial results in term of strength and density. But it badly affects the workability on increment level of stone dust. So for workable concrete different dose of super plasticizer was used.
(PDF) Stone Dust in Concrete: Effect on Compressive Strength. It is observed that the compressive strength of concrete made using 10% recycled aggregate and 60% stone dust as replacement of coarse aggregate and fine aggregate respectively, is about 11% more. Msand and Crusher Dust Difference.
The results indicate that polycarboxylate superplasticizer mixed in mortar increases with stone dust mixed because of large specific surface and water demand of stone dust. There is little effect on fluidity loss when the dosage of stone dust is below 18%, and it …
the concrete that it increases the crack resistance, ductility, energy absorption or toughness of concrete. Thus, this paper addresses the results of change of Stone dust and Steel fiber on the strength properties of concrete. The replacements are done at 0%, (30%, 1%), (40%, 1%), (50%, 1%) of fine aggregate with Stone dust and addition
Concrete is the most widely used construction material today. Increase in construction activities have led to an increase in demand for the various raw materials in concrete, especially river sand which is the conventionally used fine aggregate. Due
concrete. SAW DUST Wooden saw dust obtained from wood cutting industry with specific gravity 1.65 and saw dust passing through 2.36mm sieve was used in this work. SUPER PLASTICIZER Super plasticizer of high range water reducer from fosroc was used in this work Mix Proportion M30 Grade of concrete with cement content 450kg/m3,
Dec 27, 2018· Stone dust is not used in good concrete especially in ‘ Controlled Concrete ‘. Use of Stone dust is going to drastically reduce the workability of concrete. This is so because the stone dust particles are not rounded like natural sand particles bu...
effect of water cement ratio, dosage of superplasticizer, and characteristics of fine aggregate on flow behavior of cement mortar. For each water cement ratio, optimum dosage of superplasticizer (ODS) found has out.Six different dosages of superplasticizer were taken to study the effect of superplasticizer on
The concept of replacement of natural fine aggregate by quarry dust which is highlighted in the study could boost the consumption of quarry dust generated from quarries. By replacement of quarry dust, the requirement of land fill area can be reduced and can also solve the problem of natural sand scarcity. The availability of sand at low cost as a fine aggregate in concrete is not suitable and ...
effects on concrete, if the natural sand replaced by quarry dust. To find the effect of quarry dust various tests are conducted like compressive strength test and workability test (compaction factor). The set of series are, M20 & M25 grade of concrete with 10, 20, 30, 40, 50 and 60 percentage
sand in the mix. A reduction of 60 to 120 kg of sand per cubic meter of concrete (100 to 200 lb/yd3) may be enough. (Replace the sand removed by adding a like amount of the smallest size coarse aggregate available.) The slightly harsher mix should release most of the entrapped air with normal vibration. On
Q&A: OSHA Regulations On Concrete Silica Dust. The U.S Department of Labor will start enforcing its new concrete silica dust ruling for construction on September 23, 2017 (moved from June 23, 2017). With those new OSHA regulations coming up, it’s important to be up to date on all the new changes regarding the OSHA standards.
A material other than water, aggregates, or cement that is used as an ingredient of concrete or mortar to control setting and early hardening, workability, or to provide additional cementing properties. Admixtures of concrete are generally used to alter the properties of concrete (such as increased workability or reduced water content, acceleration or retardation of setting time, acceleration ...
Effect of Replacement of Natural Sand by Grit on Workability of Concrete K. B. Thombre1, A. B. More2, ... stone dust, manufactured sand, foundry sand or other such materials are being researched. ... (B-4) Super plasticizer
combination in a concrete mix viz., improved workability for a given w/c or reduction in free water for a target workability (Maheshwarappa et al., 2014). An extensive literature had been carried out to study the effect of superplasticizer on the compressive strength of concrete and its workability. A study
