Tag: concrete

Recent Articles-IJCSER

Effect of shear wall panels on the dynamic response of a silo
Author(s)– Sivabala.P,Elangovan.G, Kameshwari. B

ABSTRACT
In any industrial or organised storage complex, structures for the storage of bulk solids are important. These containers are usually called bins, bunkers, silos or tanks. There is no generally accepted definition for each of these terms. The essential difference between bunkers and silos lies in the ratio of their dimensions. Silos are in general structures whose height is large compared to the lateral dimensions. Materials like grains and cement ate usually stored in silos. In cement factories as well as in large construction projects, cement is stored in large silos. In the present work, dynamic analysis of a typical silo is done. During the dynamic analysis, the effect of extra plates between the supporting columns is evaluated by analysing the structure with and without the extra plates between the supporting columns. After the analysis, significant change in the frequency and mode shape of the structure is noticed. The increase in the stability of the structure to dynamic loading in the presence of extra plates between supporting columns is also evident.        

Read full text

Advertisements

Recent Articles-IJCSER

Influence of Marble powder/granules in Concrete mix
Author(s)– Baboo Raim et.al.,

ABSTRACT
In this paper the effect of using marble powder and granules as constituents of fines in mortar or concrete by partially reducing quantities of cement as well as other conventional fines has been studied in terms of the relative workability & compressive as well as flexural strengths. Partial replacement of cement and usual fine aggregates by varying percentage of marble powder and marble granules reveals that increased waste marble powder (WMP) or waste marble granule (WMG) ratio result in increased workability and compressive strengths of the mortar and concrete.

Read full text

Recent Articles-IJCSER

Effect of heavy metal present in mixing water on properties and sulfate attack on blended cement mortar
Author(s)– Madhusudana Reddy.B, Reddy Babu.G, Ramana Reddy.I.V

ABSTRACT
The effect of lead (Pb) present in mixing water on compressive strength, setting times, soundness and sodium sulfate attack of high strength cement mortar was experimentally evaluated. Cement mortar specimens were cast using deionised water and lead (Pb) spiked demonized water for reference and test specimens as mixing waters respectively. On comparison with reference specimens, at higher concentrations of lead in mixing water, test samples had shown considerable loss of strength, and also their setting times had significantly increased. However, at 2000 mg/L concentration of lead (Pb), the compressive strength marginally increased. Apart that when reference specimens and test specimens immersed in various concentrations of sodium sulfate solution at different immersed ages, the loss in compressive strength was a little less in test specimens compared with reference specimens. XRD technique was employed to find out main compounds.

Read full text

Recent Articles-IJCSER

Effect of Ternary Cementitious system on compressive strength and resistance to Chloride ion penetration
Author(s)– Hariharan A R, Santhi A S, Mohan Ganesh G

ABSTRACT
Portland cement is a highly energy intensive material. Therefore, considerable effort is being made to find substitutes for partial replacement of cement in concrete. This paper reports the results from experimental studies on the compressive strength and resistance to chloride ion penetration of concrete containing ternary blends of Portland cement, silica fume (SF) and wide range of fly ash (FA) Class C fly ash is used in this study in various proportions (i.e.) 30%, 40% and 50% and that of silica fume by 6% and 10% by weight of cement. The mix proportions of concrete had constant water binder ratios of 0.4 and super plasticizer was added based on the required degree of workability. The concrete specimens were cured on normal moist curing under normal room temperature. The compressive strength was determined at various ages and the resistance to chloride-ion penetration was measured at different ages up to 90 days. The results indicate that the concrete made with these proportions generally show excellent fresh and hardened properties since the combination is somewhat synergistic. The addition of silica fume with fly ash was found to increase the compressive strength of concrete at early age when compared to concrete made with fly ash alone. Moreover the incorporation of fly ash and silica fume in concrete increases the resistance to chloride ions and produced concrete with low permeability.

Read full text

Recent Articles- IJES

Studies on Concrete containing E plastic waste
Author(s)- Lakshmi.R, Nagan.S

ABSTRACT

Utilization of waste materials and by-products is a partial solution to environmental and ecological problems. Use of these materials not only helps in getting them utilized in cement, concrete and other construction materials, it helps in reducing the cost of cement and concrete manufacturing, but also has numerous indirect benefits such as reduction in land-fill cost, saving in energy, and protecting the environment from possible pollution effects. Electronic waste, abbreviated as e-waste, consists of discarded old computers, TVs, refrigerators, radios – basically any electrical or electronic appliance that has reached its end-of-life.  Efforts have been made in the concrete industry to use non biodegradable components of E waste as a partial replacement of the coarse or fine aggregates. An experimental study is made on the utilization of  E-waste particles as coarse aggregates in concrete with a percentage replacement ranging from 0 % to 30% on the strength criteria of M20 Concrete. Compressive strength, Tensile strength  and Flexural strength of Concrete with and without E-waste as aggregates was observed which exhibits a good strength gain. Ultrasonic tests on strength properties were executed and the feasibility of utilizing E plastic particles as  partial replacement of coarse aggregate has been presented.

Read full text