Coconut shell is a form of agricultural solid waste with possible use as coarse aggregate in the production of concrete. India occupies the premier position in the world in coconut production with an annual production of 13 billion nuts, followed by Indonesia and Philippines. ... Jain et al. studied the effect of replacement of coarse …

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 ...

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 …

Concrete hollow block is a vital component in construction industry because of its affordability, strength, and convenience. However, the excavation of conventional coarse aggregates devastates ...

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 …

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%. …

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 …

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 ...

They are used in concrete as the substitute for coarse aggregates with 0, 5, 10, 15, 20, 25, 30 and 35 percentage of substitution. All other materials (cement, sand, coarse aggregate) of same ...

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 ...

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 …

Aggregate crushing value and the impact value of CS are 1.6 and 3.94% ... Durability tests on CSAC specimen have given promising results to use CS as an alternate aggregate in the concrete production. ... Performance of coconut shell as coarse aggregate in concrete. Constr Build Mater 140:150–156. Article Google Scholar ...

Using recycled coarse aggregates in concrete production has also been studied from a mechanical (Pedro et al., 2014, Barbudo et al., 2013, Matias et al., 2013, Reis et al., 2015) and an environmental point of view (Marinkovic et al., 2010, Knoeri et al., 2013, Tosic et al., 2014), but the later only analysed a small number of mixes. Analysing …

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 …

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 …

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, …

It is also economical form of fine aggregate at coastal regions. The present study focuses on strength and elastic behavior of concrete using sea sand (SS) as partial and complete replacement of ...

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 …

The statistical analysis revealed that when the water absorption of recycled aggregates and sand falls below 5%, the compressive strength may, at most, decrease …

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 ...

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 …

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, …

The coarse aggregate composition is designed based on the SCD as shown in Table 4, and then the ternary diagram can be determined as illustrated in Fig. 3.There are 21-type samples in total and six 100 × 100 × 100 mm 3 cubic specimens are prepared for each type specimen. The concrete samples were demolded after 24 h and then cured at …

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.

Concrete is a mix of several different materials: water, fine aggregates (or sand), coarse aggregates (or gravel), chemical additives, and, most importantly, cement. Cement is what binds all of these ingredients together to give concrete its durability and distinctive, grey appearance. Cement production, however, also generates most of …

Abstract. In this study, the researchers introduce an innovative method to enhance the utilization of recycled coarse aggregates (RCA) derived from construction …

possible to use recycled rubber tires in concrete tile production as a partial replacement for coarse aggregates. Nevertheless, the percentage of replacement should be limited to 10%.

The results indicate that substitution of coarse aggregates by recycled concrete pavements may bring significant mitigation of environmental impacts and hence it …

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 …

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 ...

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 ...

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.

The concrete industry is a core element of the building sector, but it has to deal with the increasing attention on the environmental issues related to the production process: increasing energy efficiency and the adoption of alternative fuels or raw materials represent the most relevant solutions. The present work analyses physical, mechanical, …

The Production Process of Concrete: Concrete is constructed using cement mixed with an aggregate-- a grainy blend of materials such as stone and sand. After mixing, the concrete is poured into a mold and left to harden then use in building. The aggregates are sourced from a local body of water and crushed in a natural procedure.

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 …