Feldspar is a term of geology and one of the most common minerals in continental crust. Feldspar is t…
Rocks are broken, loosened and their mineral composition changes under the action of solar radiation,…
Diminishing natural sand resources have created a need for alternate materials for use as fine aggregate in portland cement concrete. Manufactured sands generally are more angular and contain a higher percentage of fines than natural sands, both of which can affect workability and water demand, and the properties of concrete.
· Influence of manufactured sand characteristics on strength and abrasion resistance of pavement cement concrete Constr. Build. Mater. , 25 ( 10 ) ( 2011 ) , pp. 3849 - 3853
· Abstract. Manufactured sand (MS) is widely considered as an alternative of the river sand (RS) recently, and to clarify the influence significance and influence mechanism of MS characteristic parameters on its concrete performance is essential to its scientific application. This paper presented series of experimental studies on the influence of .
River sand in many parts of the country is not graded properly and has excessive silt and organic impurities and these can be detrimental to durability of steel in concrete whereas manufactured sand has no silt or organic impurities
Optimization of replacement of natural sand with manufactured sand in concrete, durability studies such as water absorption, rapid chloride permeability test, sorptivity, acid resistance, alkaline.
This report describes the effects of various manufactured sands on the durability of concrete, including the effects of w/c ratio and supplementary cementitious materials. A limited investigation was also conducted on the effects of overall aggregate grading and manufactured sand gradation. 17. Key Words Natural sand, manufactured sand .
· The results showed that five kinds of manufactured sand concretes could conform to the standard requirements of high-speed railway, which proved the feasibility of preparing box girder with different lithological manufactured sand concretes. The effects of manufactured sand’s lithology and surface texture on the workability of concrete were .
impact resistance and abrasion resistance of M40 and M50 grades of concrete have been studied with. manufactured sand as fine aggregate and compared the results with the conventional sand concrete .
The compositions of manufactured sand are given in Table 2. The properties of materials shown below Table 3. Aggregates are used in saturated surface dry condition (SSD) in geopolymer concrete. Super plasticizer (naphthalene based) is used to achieve the geopolymer concrete workability. Natural sand and M-sand is falls within the limits of Zone II
· More cost effective than natural sand: Manufactured sand can be produced in areas closer to construction sites, bringing down the cost of transportation and providing an assurance of consistent supply. Compliant with the new European Standards: Manufactured sand can be used as aggregates in screed and concrete mixes, as per EN13139. It can be .
This project investigates the effects that varying water cement ratios and superplasticiser have on concrete containing manufactured sand as a complete replacement for natural sand. Due to current levels of construction in Australia there is an ever decreasing availability of natural sands suitable for use as a fine aggregate in concrete.
the concrete. Manufactured sand is popularly known by several names such as crushed sand, rock sand, green sand, robo sand, poabs sand, barmac sand, pozzolana sand, and artificial sand. The term manufactured sand is used for aggregate materials less than 4.75 mm. It …
Failure of concrete structures leading to collapse of buildings has initiated various researches on the quality of construction materials. Collapse of buildings resulting to injuries, loss of lives and investments has been largely attributed to use of poor quality concrete ingredients. Information on the effect of silt and clay content and organic impurities present in building sand being .
· Six representative parent rocks of sand, including limestone, quartzite, gneisses, granite, Basalt and Marble were selected to conduct a systematical research on the effects of various lithologies of manufactured sand on the workability, mechanism properties, volume stability and durability of manufactured-sand concrete. The experimental results show that the strength of manufactured-sand .
· The results of sand and mortar testing were used in the development of the subsequent testing phase, examining the effects of manufactured sand properties on concrete water demand utilizing full-scale concrete mixtures. A statistically based water demand model was developed for conventional strength concrete.
of manufactured sand depend upon the source of its raw material, i.e., parent rock. Hence the selection of the quarry is very important to quality fine aggregate. Mahendra R Chitlange et al. (2010) experimentally proved that due to addition of steel fiber to natural sand concrete and manufactured sand concrete there is a
Waste foundry sand engineering characteristics: since waste foundry sand has nearly all the properties of natural or manufactured sands, it can normally be used as a sand replacement. It can be used directly as a fill material in embankments. It can be used as a sand replacement in hot mix asphalt, flowable fills, and Portland cement concrete. it
The impact of powder volume on the low strength manufactured sand concrete workability under same sand ratio is analyzed with improved Mehta method. The experimental result shows that freshly mixed low strength manufactured sand concrete workability can be evaluated with powder volume equivalent coefficient and the reasonable powder equivalent .
International Journal of Research and Scientific Innovation (IJRSI) | Volume IV, Issue VII, July 2017 | ISSN 2321–2705 Effect of Fineness Modulus of Manufactured Sand on Mechanical Properties of Self Compacting Concrete D. Pavan Kumar*1,C. Sashidhar2 1 Reserach Scholar, Ph.D, Department of Civil Engineering, Jawaharlal Nehru Technological University, Anantapur, India 2 Professor, Department .