LAUTECH Journal of Civil and Environmental Studies; DOI:10.36108 ... Within a standard concrete mix, a fine aggregate and a coarse aggregate are added to the mix design to help with solidity and ...
Initially, the concrete is was compacted a with tamping rod and later compacted by giving 5 and 10 additional blows over an area of 100 × 100 mm. Generally, the PC water-cement ratio was found to vary from 0.24 to 0.42 and the aggregate-to-cement ratio varies from 3.97 to 6.50 . In the present study, these values are 0.35 and …
Recycled Concrete Aggregates: A Review. CC BY 2.0. Authors: Katrina McNeil. Thomas H.-K. Kang. Abstract. This paper discusses the properties of RCA, the effects of RCA use on concrete …
The methodology adopted in this study is an analysis of literature sources that address the quality improvement techniques and their effects on the properties of …
concrete with the ingredients of ordinary Portland cement 53 Grade, natural river sand and the crushed stone of maximum size 20 mm and also casting and testing of partially plastic waste replaced (10%, 20% & 30% of replacement with fine aggregate in concrete) concrete cubes (100mm x 100mm x 100mm), cylinders(100mm x 200mm),prisms …
However, an increase Concrete Aggregate. ACI Materials Journal, in the amount of recycled aggregate increased salt 109(1),91-100. scaling. Concrete with commercial recycled [6]. Best practice guide for the use of recycled aggregate samples exhibited significantly more mass aggregates in new concrete. ...
Publication: Materials Journal. Volume: 93. Issue: 2. Appears on pages(s): 178-181. ... Test results indicate that the strength characteristics of recycled aggregate concrete are influenced by key factors, such as the strength of the ori-inal concrete, the ratio of coarse to fine aggregate in the original concrete, the ratio of top size of ...
The water absorption test was performed on M 30 conventional concrete and pumice lightweight aggregate concrete.From the water absorption test, ... Silica Fume and Fly Ash as a Partial Replacement of Coarse Aggregate" International Journal of Innovative Research in Science, Engineering and Technology, Volume 3, Issue – 12, 18130 – 18138 ...
In this paper, a comprehensive literature review was conducted on the utilization of recycled concrete aggregate (RCA), which is the dominant construction and demolition waste material, in base and subbase layers and its comparison with natural aggregate (NA).
Abstract. The use of coal gangue as coarse aggregate alleviates the dependence of concrete on natural aggregates and improves the utilization rate of coal gangue resources. The direct use of coal gangue coarse aggregate in the preparation of concrete limits the scope of its use due to the deterioration of its performance.
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 07 Issue: 03 | Mar 2020 p-ISSN: 2395-0072 ... Recycled aggregate concrete may be an alternative to the conventional concrete. 2. Water required producing the same workability increases with the increase in the percentage of demolished waste.
Furthermore, it was also suggested to use the recycled aggregates from 30 to 50% to achieve the strength equivalent to natural aggregate concrete with supplementary cementitious materials. More research is imperative in the area of unconventional supplementary materials in recycled aggregate concrete and full …
The modification method and the replacement rate of recycled coarse aggregate (RCA) have a great influence on the properties of recycled aggregate concrete (RAC). This paper aims to study the properties of RAC changes with the replacement rate and analyze the modification mechanism. Composite impregnation treatment was carried …
This paper aims to thoroughly analyze the effect of polyethylene terephthalate (PET) plastic aggregate on concrete compressive strength using a meta-analysis. Forty-three datasets for concrete containing PET coarse aggregate and 60 data sets for concrete containing PET fine aggregate were collected. The input variables used were …
Payam Shafigh, Mohd Zamin Jumaat & Hilmi Mahmud (2010), Mix design & mechanical properties of oil palm shell lightweight aggregate concrete: a review, International journal of the physical ...
Recycled concrete aggregate (RCA) is derived from crushed clean concrete debris, and is regarded as an alternative to using natural aggregate (NA) in concrete (Tam et al., 2018). Its relevant contents including physical properties, microscopic structural characteristics, and chemical composition, are detailed as follows. ... Journal …
The effect of carbonation treatment and mixing method on the mechanical properties and interfacial transition zone (ITZ) properties of recycled aggregate concrete (RAC) was investigated. Properties of recycled concrete aggregate (RCA) were tested firstly. Then, five types of concretes were made and slump of fresh concrete was …
Recycled aggregate concrete: A sustainable built environment. Paper presented at the ICSBE: International conference on sustainable built environment. Ryou, J. S., & Lee, Y. S. (2014). Characterization of recycled coarse aggregate (RCA) via a surface coating method. International Journal of Concrete Structures and Materials, 8(2), …
This study provides a comprehensive review on recycled aggregate (RA) and recycled aggregate concrete (RAC) regarding their history, recycling, reuse and …
According to Building Innovation & Construction Technology (19 (1999), 99), Stone says that the 10mm recycled aggregate and blended recycled sand are used for concrete kerb and gutter mix in the Lent hall Street project in Sydney. The major advantage is based on the environmental gain. Introduction Recycling is the act of processing the used ...
Journal of Civil Engineering and Construction Technology Vol. 3(2), pp. 42-48, February 2012 ... DOI: 10.5897/JCECT11.088 ISSN 2141-2634 ©2012 Academic Journals Review Pelletized fly ash lightweight aggregate concrete: A promising material A. Sivakumar* and P. Gomathi VIT University, India. Accepted 28 December, 2011
The chemical and physical interactions in the interfacial transition zone (ITZ) between three different types of coarse aggregates (limestone, granite and basalt) and cement paste were investigated. The results show that all the aggregates are chemically active. Significant amounts of Ca2+, K+, and Na+ are absorbed by all the aggregates …
Concrete is the most widely used construction material. Cement, which is the binder in concrete, is produced in increasing quantities each year and the total production of cement around the world is estimated approximately 5 billion tons [].Manufacture of Portland cement is the third most energy-intensive production process and production of …
Pervious concrete is a tailored-property concrete with high water permeability which allow the passage of water to flow through easily through the existing interconnected large pore structure. This paper reports the results of an experimental investigation into the development of pervious concrete with reduced cement content …
Journal of Cleaner Production. Volume 282, 1 February 2021, 124447. Review. ... 4-10 −2 m mesoscale, the concrete is regarded as a heterogeneous material composed of different phases, including the aggregate, cement matrix, ITZ, and pores. The mesoscale numerical simulation, validated with test results, has been demonstrated as a …
In the present investigation, an attempt was made to study the influence of the strength of parent concrete on the properties of recycled aggregates and recycled aggregate concrete. In this study, four grades of normal concrete mixes: M20, M25, M30, and M40 were considered as parent concrete to produce the recycled coarse …
The density of lightweight marble perlite aggregate used in structural concrete industries is 160-200 kg/m 3 [1] [2]. One of its advantages is that, according to BS EN 206-1, it contains an oven ...
Accumulations of worn‐out automobile tires create fire and health hazards. As a possible solution to the problem of scrap‐tire disposal, an experimental study was conducted to examine the potential of using tire chips and crumb rubber as aggregate in portland‐cement concrete.
Journal of Building Engineering. Volume 19, September 2018, Pages 349-365. Strength and durability of concrete containing recycled concrete aggregates. ... The recycled concrete aggregate consists of rock pieces from parent concrete and partly adhered mortar used in the parent concrete. The old adhered mortar layer on the …
Journal of the American Ceramic Society (JACerS) is a leading ceramics journal publishing research across the field of ceramic and glass science and engineering. At the macroscopic scale, concrete …