Environmental Impact and Sustainability of Aggregate Production in
The production of aggregate for the infrastructural development of the country has been increasing for the last three decades due to the high urbanization rates in the main cities of the country and the ever-growing demand for basic infrastructural facilities. The environmental impact of both fine and coarse aggregate production is now hard …
(PDF) Use of Waste Marble Sand in Concrete
In this paper, we have replaced fine aggregates in concrete with waste marble sand of size 1-2mm (marble fine aggregates) in an M20 mix design as per IS CODE 10262. As waste marble is a low-cost ...
Properties of concrete made with crushed concrete as coarse aggregate
The effects of using recycled concrete aggregates instead of natural aggregates in concrete are: reduction in compressive strength up to 25%; reduction in modulus of elasticity up to 30% ...
Steel slag and its applications in cement and concrete …
Use of steel Slag as coarse and fine aggregate in concrete was presented. ... When the environmental effects during the production of such materials are considered, the use of industrial wastes draws attention as the most important and effective solution. ... [64] prepared 6 different mixtures using natural sand at ratios of 0–60% and steel ...
Assessment of Quality of Sand Sources and the Effect on the …
Use of poor-quality construction materials (such as sand, coarse aggregates or water) results in poor quality structures and may cause structural failures leading to injuries, deaths and loss of investment for developers [3, 5]. Fine and coarse aggregates make about 70% by volume of concrete production.
Use of waste glass and demolished brick as coarse aggregate …
Concrete production uses 1.5 billion tonnes of cement, ... Concrete is made by mixing cement, sand, coarse aggregate, ... When the amount of WGA and DBA in the hardened concrete reaches 50%, it has a big impact on the strength of the concrete. It gets weaker when the percentage of glass and brick in the concrete goes up above 50% …
Impact of waste ceramic tiles as partial replacement of fine and coarse
Under the concept the properties of conventional coarse aggregate and ceramic waste were mapped from which test results indicate that compressive strength and the split tensile strength of ...
Partial Replacement of Sand with Sawdust in …
This study investigated the use of sawdust as partial replacement. for fine aggregates in concrete production. Sawdust was used to replace fine aggregates from 0% to. 50% in steps of 10%. …
(PDF) Recycled aggregates in concrete production: …
The present paper discusses the various possible recycled aggregates used in concrete production, their effect on both fresh and hardened properties as well as durability performances. The ...
How Coarse Aggregate Affects Mix Design of …
Coarse aggregate is one of the essential components of concrete and occupies the largest volume in the mix. That is why it greatly affects the concrete mix design. Its properties such as strength, maximum size, shape, and water absorption influence water demand, the …
Assessment of environmental impact of coarse …
The results indicate that substitution of coarse aggregates by recycled concrete pavements may bring significant mitigation of environmental impacts and hence it …
Alternative fine aggregates in production of sustainable concrete …
This approach led the researcher to utilize C&D waste as aggregate replacement in concrete production, but a large no of studies uses C&D waste as coarse aggregate replacement in concrete, whereas ...
Construction and demolition waste as recycled aggregate …
Recycled aggregates (RA) from construction and demolition waste (CDW) instead of natural aggregates (NA) were analysed in the manufacture of new eco-friendly concrete. Fine (FRA) and coarse (CRA) recycled aggregates were used in different percentages as substitutes of natural sand and gravel, respectively. The results revealed …
Using Recycled Concrete as a Replacement for Coarse Aggregate …
Hebhoub et al. (), using the marble waste in the concrete manufacturing solves this problem environmentally and economically, especially with a 75% replacement value -of any formulation- under constant water to cement ratio.The use of the marble waste as replacement for coarse and fine aggregate separately or together leads to an …
Effects of coarse and fine aggregates on long-term …
Typical effects of coarse and fine aggregates on the long-term properties of sea sand recycled aggregate concrete (SSRAC) are analyzed by a series of axial compression tests. Two different types of fine (coarse) aggregates are considered: sea sand and river sand (natural and recycled coarse aggregates). Variations in SSRAC …
Effect of iron ore tailings as partial replacement to fine aggregate …
The purpose of this research is to determine how well sand can stand in as a partial substitute for iron ore tailings without negatively impacting the microstructure, strength, or durability of concrete. The concrete mix is designed as 1:1.62:3.25 (cement: sand: coarse aggregate) with a water-to-cement ratio (W/C) of 0.48.
Utilization Of Corn Cob As A Partial Replacement Of Coarse Aggregate …
To implement such ventures concrete must be used which require a n. immense quantity of non-renewable resources such as Fine aggregates, Coarse. aggregate, and Cement. Corn is one of the widely ...
The Effects of Aggregate Properties on Concrete Mix …
This article reviews the literature on the effects of coarse aggregate type on the mix design of concrete. Key parameters are identified, and a chart is plotted to help …
Impact of waste ceramic tiles as partial replacement of fine and coarse
Sixteen concrete mixes were cast, including a control concrete mix (CC) and fifteen recycled concrete mixes, all of which used ceramic fine aggregates (FCA) concrete: FCA1, FCA2, FCA3, FCA4, FCA5 for sand replacements and ceramic coarse aggregate (CCA) concrete; and CCA1, CCA2, CCA3, CCA4, CCA5 for coarse …
Aggregates for Concrete
3.9.2—Effects of harmful substances 3.9.3—Test methods Chapter 4—Sampling aggregates, p. E1-20 ... A typical consensus specification for fine and coarse aggregate …
The effects of limestone aggregate on concrete properties
The total of aggregates produced in 2008 by weight was 69% limestone and dolomite, 15% granite, 7% traprock and 9% miscellaneous stones consisted of sandstone and quartzite, marble, volcanic cinder and scoria, slate, shell, and calcareous marl as shown in Fig. 1.By 2020, US production of crushed limestone is expected to increase by …
Comparative LCA of concrete with natural and recycled coarse aggregate
3.1 Goal and scope. The goal of the present study is to compare the environmental impact caused by producing and transporting concrete mix constituents (coarse and fine aggregates, cement, and water) required for producing 1 m 3 of (1) concrete with only NA used as coarse aggregate, and (2) concrete of the same …
Partial Replacement of Coarse Aggregate with Waste Glass in Concrete …
The combination of waste glass and granite were used as co arse aggregate at 0%, 10%, 15%, 20%, 25%, 30% and 35% . The mixing was done on a dry, clean and hard surface. The fresh mixture was cast ...
Electric Arc Furnace Slag as Coarse Recycled Aggregate for Concrete
Materials. The materials used for all the mixes are Ordinary Portland Cement type I 52.5R class, as defined in EN 197-1 []; natural calcareous sand with a maximum size of 4 mm was considered as fine aggregate; siliceous coarse aggregates with a maximum size of 16 mm; EAF slag aggregates, with a maximum size of 16 mm maximum size, …
Alternative fine aggregates in production of sustainable concrete …
These alternative fine aggregate (AFA)/manufactured sand (MS) are generally produced from natural sources or any other sources like old concrete, rocks, industrial wastes after processing using thermal, mechanical and chemical separation, washing, crushing and scrubbing (Dash et al., 2016).
Increasing sustainable aggregate usage in concrete …
Manufactured sands are essentially a waste product from producing coarse aggregate and so it is widely available, has a lower cost, and would decrease the mining …
Effects of aggregate sizes on the performance of …
Increasing maximum coarse aggregate size led to higher strengths, with 40 mm sizes exhibiting the highest, and 12 mm the lowest. Compressive strengths ranged from 22.1 to …
AN EXPERIMENTAL INVESTIGATION USING RECYCLED COARSE AGGREGATE …
The coarse aggregate replacement was carried out in four different percentages with 0%, 25%, 50% and 75% in concrete where the specimens were cured for the period of 7 and 28 days.
The Effects of Aggregate Properties on Concrete Mix …
2.1 Physical Properties of Coarse Aggregates 2.1.1 Gradation. Particle size distribution of aggregates significantly affect the packing density and void content in concrete. According to Neville [], the gradation of aggregate has the main role in establishing the workability of mixtures.Gradation can influence workability, segregation, …
Enhancing concrete performance: Surface …
Abstract. In this study, the researchers introduce an innovative method to enhance the utilization of recycled coarse aggregates (RCA) derived from construction …
