scholarly journals STRENGTH AND DURABILITY TEST (SULPHATE ATTACK) ON LIGHT WEIGHT CONCRETE BY PARTIAL REPLACEMENT OF VERMICULITE FOR FINE AGGREGATE AND SILICAFUME FOR CEMENT

2021 ◽  
Vol 5 (12) ◽  
Author(s):  
M. Preethi ◽  
Md. Hamraj ◽  
Ashveen Kumar
Keyword(s):  
Sulphuric Acid ◽  
Concrete Strength ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Sulphate Attack ◽  
Durability Test ◽  
Measuring Machine ◽  
Strength And Durability ◽  
The Impact ◽  
Current Report

The present study focuses on the preparation of M30 grade concrete by replacing fine aggregate with 0%,5%,10%,15%,20%,25% of vermiculite and cement with 0% and 10% of constant silica fume to improve the performance of concrete. Via experimentation, the impact of acid exposure on concrete strength and weight is investigated in the current report. Concrete cubes of different mixes(12no.’s) are casted and exposed to Sulphuric acid of (pH=3). Cubes with dimensions of 100mm x 100mm x 100mm are cast with M30 concrete and then immersed (cured) in water for 28 days. The cubes are then soaked in 4 percent concentrated Sulphuric acid for 7 days. The compressive strength of the cured cubes is then measured using a compressive measuring machine.

Strength Assesment of Asphaltic Concrete using Bitumen, Natural Fibre and Stone Dust: A Critical Review

2021 ◽  
Vol 9 (VI) ◽  
pp. 3044-3050
Author(s):  
Divesh Sharma
Keyword(s):  
Compressive Strength ◽  
Natural Fibre ◽  
Maximum Strength ◽  
Sisal Fiber ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Asphaltic Concrete ◽  
Stone Dust ◽  
Strength And Durability ◽  
Research Studies

In this review article, the usage of bitumen, sisal fiber and the sisal fiber for improving the strength parameters of concrete is discussed in detail. Numerous research studies related to the usage of bitumen, sisal fiber and stone dust are studied in detail to determine the results and outcome out of it. Previous research works showed that all, these materials were enhancing the strength and durability aspects of the concrete and depending upon the research studies certain outcomes has been drawn which are as follows. The studies related to the usage of the bitumen or asphalt in concrete so as to produce bituminous concrete or asphaltic concrete, the previous research works conclude that the maximum strength was attained at 5 percent usage of the bitumen and after further usage the general compressive strength of the concrete starts declining. The previous studies related to the usage of the sisal fiber showed that with the usage of the sisal fiber in the concrete, the strength aspects of concrete were improving and the maximum strength was obtained at 1.5 percent usage of the sisal fiber and after his the strength starts declining. Further the studies related to the usage of the stone dust showed that with the usage of stone dust as partial replacement of the natural fine aggregate the compressive strength of the concrete was improving and it was conclude that with the increase in the percentage of the stone dust, the compressive strength of the concrete was increasing.

scholarly journals Environmental Assessment of Frost-resistant Concrete with Superabsorbent Polymers

2020 ◽  
Vol 63 (2) ◽  
pp. 43-62
Author(s):  
Gui Li ◽  
Marianne Tange Hasholt ◽  
Ole Mejlhede Jensen
Keyword(s):  
Environmental Impact ◽  
Concrete Strength ◽  
Significant Loss ◽  
Strength Increase ◽  
Life Cycle Assessment Methodology ◽  
Void System ◽  
Strength And Durability ◽  
Air Entraining Agents ◽  
Air Void ◽  
The Impact

AbstractAir-entraining agents (AEA) are normally used to improve the frost resistance of concrete. However, it is not possible to accurately control the air void system in concrete with AEA. Thus, a significant loss of concrete strength is caused by over-dosing voids, and this increases the environmental impact from concrete structures. Superabsorbent polymer (SAP) can also be used to produce frost-resistant concrete. Compared to AEA, it can be used to precisely engineer the air void structure of concrete, promote cement hydration, and mitigate self-desiccation cracks. In this study, life cycle assessment methodology is applied to evaluate the overall environmental impact of frost-resistant concrete based on AEA and SAP, respectively. The results illustrate that frost-resistant concrete with SAP has a lower environmental impact than frost-resistant concrete with AEA if the strength and durability of concrete are considered in the defined functional unit. In addition, frost-resistant concrete with SAP reduces the environmental burdens of the vertical elements such as columns, but it increases the environmental load of the horizontal elements such as slabs, where the strength increase cannot be utilized. Moreover, the inventory data for AEA and SAP can affect the impact assessment results.

scholarly journals Recycling of Waste Plastic into Fine-Grained Concrete Without Strength Reduction

2021 ◽  
Vol 915 (1) ◽  
pp. 012002
Author(s):  
M Chekanovich ◽  
S Romanenko ◽  
Ya Andriievska
Keyword(s):  
Negative Impact ◽  
Concrete Strength ◽  
Environmental Safety ◽  
Plastic Waste ◽  
Point Of View ◽  
Partial Replacement ◽  
Fine Grained ◽  
Concrete Production ◽  
Research Findings ◽  
The Impact

Abstract The problem of recycling plastic waste is quite acute both in Ukraine and for most countries of the world. The use of plastic processing products can be considered an urgent problem of society from the point of view of environmental protection and environmental safety. Today, developments are underway in the field of using polymers in one of the largest sectors of production – the construction industry. In recent years, the scientific community has been actively studying the issue of using plastic waste in the manufacture of reinforced concrete structures, that is, partial replacement of the filler with plastic particles. At the same time, in the short term, sufficient resources of plastic waste will be provided, which will come in value for collection and recycling. The use of plastic in concrete production technology will not only reduce the negative impact of waste on the environment, but also develop concrete of more sustainable quality and lower cost. The aim of the study is determining the amount of plastic waste that can be utilized through introducing it into concrete mix without reducing the strength of the concrete. Here we have considered the issue of the impact of the degree of plastic grinding on concrete strength. The research findings show that the introduction of plastic in an amount up to 3.5% of the volume of concrete as a substitute for the aggregate does not reduce its compressive or flexural strength.

scholarly journals Mathematical modelling of concrete compressive strength with waste tire rubber as fine aggregate

2021 ◽  
Vol 15 (3) ◽  
pp. 8344-8355
Author(s):  
B. W. Chong ◽  
R. Othman ◽  
P. J. Ramadhansyah ◽  
S. I. Doh ◽  
Xiaofeng Li
Keyword(s):  
Compressive Strength ◽  
Concrete Strength ◽  
Strength Loss ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Concrete Compressive Strength ◽  
Tire Rubber ◽  
Waste Tire ◽  
Rubber Particles ◽  
Waste Tire Rubber

With the increasing number of vehicle due to the boom of population and rapid modernisation, the management of waste tire is growing problem. Reusing grinded tire rubber in concrete is a green innovation which provide an outlet for reusing waste tire. While providing certain benefits to concrete, incorporation of tire rubber results in significant loss of concrete compressive strength which hinders the potential of rubberised concrete. This paper aims to develop mathematical models on the influence of tire rubber replacement on the compressive strength of concrete using design of experiment (DoE). 33 data sets are gathered from available literature on concrete with waste tire rubber as partial replacement of fine aggregate. Response surface methodology (RSM) model of rubberised concrete compressive strength shows great accuracy with coefficient of determination (R2) of 0.9923 and root-mean-square error (RMSE) of 2.368. Regression analysis on the strength index of rubberised concrete shows that rubberised concrete strength loss can be expressed in an exponential function of percentage of replacement. The strength loss is attributed to morphology of rubber particles and the weak bonds between rubber particles and cement paste. Hence, tire rubber replacement should be done sparingly with proper treatment and control to minimise concrete strength loss.

scholarly journals Hardened Properties of Concrete Containing Copper Slag, Rock Dust and Polypropylene Fiber

2019 ◽  
Vol 8 (12) ◽  
pp. 2226-2233
Keyword(s):  
Raw Materials ◽  
Concrete Strength ◽  
Polypropylene Fiber ◽  
Copper Slag ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Conventional Concrete ◽  
Super Plasticizer ◽  
Concrete Mix ◽  
Rock Dust

The concrete is the material that is obtained from concrete forming materials. These raw materials are mixed in particular proportions, these proportions are based on different concrete grades. These concrete grades defines the strength of the concrete. Construction of structures are based upon concrete, the construction process is growing day by day at a huge scale, hence there is more demand for the raw materials. In order to maintain the demand, excessive extractions of raw materials are done, which makes environment more harmful. In order to limit the extraction of natural raw materials that are used for producing concrete mix, alternative supplementary materials are replaced with fine aggregates. This study involves using of alternative supplementary materials as partial replacement of fine aggregate by copper slag and rock dust, copper slag and rock dust are used at various proportions. The various proportions of rock dust and copper slag are 0% to 50% replacement at an increment of 5% interval. Polypropylene fiber is the material that is added as supplementary material to the concrete mix, it is added at constant volume of 1.5% volume of concrete, it is mixed in concrete to improve toughness and reduce shrinkage of concrete. Super plasticizer admixture that is used is Conplast SP430DIS which contains sulphonated naphthalene formaldehyde is added to cement based on site trails which increases the early concrete strength. Combining copper slag, rock dust, polypropylene fiber and super plasticizer admixture in modified concrete gave best results when compared to conventional concrete due to content of silica in copper slag. Hence this combination can be used for further investigation

A Comparative Study on Thermal Insulation Properties of Partial Replacement of Fine Aggregate by E-Waste Material (FR-4) in M30Grade with Conventional Concrete

2016 ◽  
Vol 692 ◽  
pp. 104-109
Author(s):  
A.A. Dhanraj ◽  
C. Selvamony
Keyword(s):  
Concrete Slab ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Durability Test ◽  
Closed Chamber ◽  
Conventional Concrete ◽  
Steady State Condition ◽  
Compressive Strength Test ◽  
Slab Temperature ◽  
Heat Transformation

The purpose of this experiment is to analyze the steady state condition in a concrete slab. Temperature measurements were made for each scenario and were used along with physical dimensions to compute various heat transfer parameters. In this paper, the investigation was made by the partial replacement in the coarse aggregate with E-waste (PCB cutting waste) (FR-4) in the conventional concrete. The durability test such as compressive strength test, split tensile and flexure strength were made and the results analyzed. The investigation is made by casting slab panels of various thickness (1’ x 1’ x 0’-2”, 1’ x 1’ x 0’-4”, 1’ x 1’ x 0’-6”, 1’ x 1’ x 0’-8” & 1’ x 1’ x 0’-10”) with same area and different temperature. These panels were allowed for curing of 28 days and tested in a closed chamber. The heat was transferred from one part of chamber to another chamber through the slab element. Then the heat transformation and U-factor will be calculated and the insulation properties of the e-waste concrete with conventional concrete

scholarly journals Performance of Copper Slag Concrete Exposed to Elevated Temperature for Low Duration

2020 ◽  
Vol 8 (5) ◽  
pp. 650-655
Keyword(s):  
Elevated Temperature ◽  
Standard Form ◽  
Copper Slag ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Normal Concrete ◽  
River Sand ◽  
Rapid Urbanization ◽  
Concrete Production ◽  
The Impact

River sand is the standard form of fine aggregate used in the concrete production. In this present era of rapid urbanization, to meet the increasing demand of natural sand by the construction industry, massive scale depletion of the river bed is being carried out which is causing a considerable negative impact on our environment. Hence it is highly imperative to find sustainable fine aggregates to meet the global demand without disturbing our ecosystem. Copper slag is one such sustainable material which has a promising future to be used as an alternative to river sand. This paper presents a study on finding the optimum dosage of copper slag (CS) as partial replacement sand in preparation of concrete. Further, as part of durability study, the impact of elevated temperature of 2000 C, 4000 C and 6000 C for 4 hours exposure period on strength characteristics of copper slag blended concrete has been presented and been compared with that of normal concrete. The results indicate that copper slag concrete has excellent resistance to weight and strength loss at an elevated temperature of 2000 C, 4000 C compared to normal concrete however at 6000 C copper slag concrete shows similar trends like normal concrete. In the present experimental study, M20 & M30 concrete grades were used.

scholarly journals Strength Behavior of Concrete by Partial Replacement of Fine Aggregate with Ceramic Powder

2019 ◽  
Vol 8 (2) ◽  
pp. 5712-5718 ◽  
Keyword(s):  
Natural Resources ◽  
Building Materials ◽  
Ceramic Industry ◽  
Concrete Strength ◽  
Ceramic Powder ◽  
Raw Material ◽  
Flexural Behavior ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Fine Aggregates

Concrete is currently the world's biggest consumer product that uses natural resources such as sand, crushed stone, and water. Research is under way today to decrease consumption of these materials, due to the depletion of these natural resources for concretion. The fast building growth in India led to a lack of standard building materials. The amount of concrete used and the accessibility of raw material in a developed country such as India are much lower. Ceramics produce wastes inevitably in the ceramic industry, regardless of improved processes; around 15%-30% of production is waste output. The ceramic industry dumps waste in all surrounding storage or empty regions close to the facility, although reported locations are labelled for discarding. The pollution of the dust and the occupation of a broad area of soil is caused by serious environmental contamination especially after the powder is dry. Ceramic dust is the most important waste from the ceramic industry. This paper investigates concrete strength features through fractional substitution of fine aggregates with ceramic powder. The fine aggregate was partly combined with ceramic powders in the current experimental study for M25 concrete grade. The tests were performed with 10 percent, 30 percent, 40 percent, 50 percent substitution of fine aggregates with ceramic powder by weight and 28 days of strength testing to evaluate the mechanical characteristics i.e.; compression, tension, and flexural behavior. The optimum proportion of ceramic powder addition is evaluated in view of the mechanical requirements of concrete

scholarly journals Experimental study on strength and durability of cement and concrete by partial replacement of fine aggregate with fly ash

2017 ◽  
Vol 1 (2) ◽  
pp. 10-14 ◽  
Author(s):  
Waheed Tariq ◽  
Syed Qalandar Hussain ◽  
Dr. Abdul Nasir ◽  
Nafeesa Tayyab ◽  
Syed Hamza Gillani ◽  
...  
Keyword(s):  
Experimental Study ◽  
Fly Ash ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Cement And Concrete ◽  
Strength And Durability
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