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The workability and consistency of. ... This investigational study aims to examine the influence of using recycled coarse aggregate (RCA) instead of natural coarse aggregate (NCA) on the fresh ...
very less compared to LDPE. However, recycled plastic aggregate used in the experiment is a waste product produced during the recycling of LDPE. So, the energy consumption and greenhouse gas emission during the production of this plastic aggregate are considered negligible. Therefore, the use of this plastic aggregate in concrete mix can be
There have been efforts to use building demolition waste as an alternative aggregate in concrete to decrease the use of natural resources for construction. The World Green Building Council estimates that the …
(Citation 2020) investigated the feasibility of using recycled glass as an aggregate in pavement structures. The results revealed that limestone aggregates showed less drainage potential compared to recycled glass. ... However, the proportion of particles finer than 0.425 mm (the maximum particle size used in the consistency limits test) for ...
Recycled plastic: shredded and processed plastic, used as aggregate in concrete mixtures. Recycled aggregates offer a sustainable and environmentally friendly alternative to traditional aggregates. They reduce the demand for raw materials and minimize waste. Recycled glass is made from recycled glass materials.
This study analysed the effect of substituting different percentages of natural aggregate with recycled aggregate from concrete crushing, using a coarse fraction as well as a fine fraction. Natural and recycled materials were classified in order to analyse the mechanical performance and impermeability of these eco-concretes in the fresh state as well as in the …
The use of recycled aggregate concrete maximizes the economic benefits of CDW. Proprieties of concrete with recycled aggregate differ than that of conventional concrete. The slump of concrete made with recycled aggregate is lower than that of the conventional concrete due to the higher water absorption capacity of recycled aggregate (RAC).
Mixing and specimen preparation. Table 2 displays the quantities of each element, namely cement, fine aggregate, coarse aggregate, and recycled coarse aggregate. Moreover, Table 2 accurately computed the optimal blend ratios for casting each design, using the …
permissible limits as per IS 8112:1989[9]. The properties are shown in Table 1. Table 1: Physical Properties of 43 Grade Ordinary Portland Cement Property Results Specific gravity 3.15 Normal consistency 30% Setting time (min) ... The concrete specimens are prepared with natural aggregate and fully recycled aggregate for three grades of ...
The basic physical properties of recycled aggregate and river sand used in this test are shown in Table 1.The cement is Lanting brand M 32.5 masonry cement produced by Shaoxing Zhaoshan Building Materials Co., Ltd., and the main technical performance indexes are shown in Table 2 and Table 3.Nanosilica produced by Jiangsu Maitu Silicon Co., Ltd. belongs …
effect is more pronounced in fine recycled aggregate (FRA) than coarse recycled aggregate (CRA) owing to the presence of more ACP in the FRA matrix [4]–[9]. Secondly, the lack of accepted design methods to optimize the quality of concrete containing recycled aggregate may have contributed to the apparent shortcomings in the properties of ...
Only the chipping of concrete according to type 1 and type 2 (as defined in the above standard) can be used for concrete production. Type 1 RA can be associated to a RCA: it contains at least 90 % of concrete and natural aggregates, not more than 10 % of clinker, non-pored bricks, sand-lime bricks, less than 2 % of other mineral materials and less than 1 % of …
Fig. 10 shows concrete containing natural coarse aggregate and recycled brick coarse aggregate (Liu et al., 2021). Hence, the RCA's physical, chemical, and mechanical …
The behavior and fatigue limit of recycled aggregate concretes with 0%, 20%, 50% and of coarse RCA with different w/c ratios have been obtained. 2. Experimental program. A total of 24 mixtures under fatigue loadings have been studied. Six control concretes (CC) with natural limestone aggregate (NA) and 18 substitutions of 20%, 50% and ...
It can be observed that gradation curve falls within the ASTM defined limits (Table 1). Recycled aggregate (RA) was obtained from the waste concrete that was free from all other type of impurities (brick, steel, plastic etc.). ... Consistency, initial setting time and final setting time of cement pastes with different dosages of molasses (0%, 0 ...
This concrete trial was prepared using only natural, fine and coarse, aggregates to show workability, measured by slump test [ 2 ], of 100 ± 20 mm. The concrete trial used for …
The use of recycled aggregates for concrete production is regulated through the European existing standards, and it is limited to the coarse recycled concrete aggregate …
Wasted concrete was often used as a recycled aggregate instead natural stone in fresh concrete to reduce the environmental impact in a decade. However, because of the residual mortar interface, the performance of recycled aggregate was weaker. In this paper, the recycled aggregate was prewetted, and the effects of prewetted degree on the workability, …
Consistency (%) 34: Fe 2 O 3: 4.24: Initial setting time (min.) 95: ... and CRCA (nominal sizes of 10 mm and 20 mm) within the gradation limit of IS 383 [22] and to achieve a …
This study proposes the use of diatomaceous earth (DE) as a surface-treating agent for recycled aggregate (RA) to enhance the performance of recycled aggregate concrete (RAC). The treatment process involves pre-saturating the RA and applying a coating using a slurry composed of calcined DE and ordinary Portland cement at specific proportions. Test …
This paper discusses the suitability of producing concrete with 100 % recycled aggregate to meet durability and strength requirements for different applications. Aggregate strength, gradation, absorption, specific gravity, shape and texture are some of the physical and mechanical characteristics that contribute to the strength and durability of concrete. In general, …
the recycled aggregate and consequently the properties of the fresh and hardened concrete made from it. This adhered mortar can limit the strength of recycled aggregate concrete particularly where the parent concrete strength is lower than the target compressive strength of the recycled aggregate concrete.
1 School of Geological Engineering and Surveying, Chang'an University, Xi'an, China; 2 Water Cycle and Geological Environment Observation and Research Station for the Chinese Loess Plateau, Ministry of Education, …
The raw material required for laboratory and field investigations was procured from different sites. Recycled aggregates were collected by milling the bituminous layer of Narwana-Tohana Road (MDR-112), Jind, Haryana, as shown in Fig. 1.To maintain the homogeneity, self-prepared sampling pattern was followed according to which samples were collected from the …
A literature review comprising 163 publications published over a period of 26 years from 1992 to 2018 is presented in this paper. This review discusses the generation and recycling of construction and demolition waste (CDW) as well as its main uses as raw materials for the construction engineering sector. This review pays attention to the use of CDW aggregates for …
Recycled aggregate reduces the impact of waste on environment. By using some percentage in construction sector, cost is saved, due to reduction of transportation & manufacturing process. ... limit. From crushing & impact test it is found that use of recycled aggregate is possible for application other than wearing surfaces. Compressive test on ...
Same great consistency and performance as aggregate. CIRCULAR ECONOMY. By reclaiming aggregate, normally waste material, we are driving a circular economy in infrastructure, industry and the building sector. SUITABLE …
The materials used for the mix comprised cement, recycled plastic, sand, 10 mm aggregate, 20 mm aggregate, and water. Precise quantities of these materials for various mixes were batched by weight and …
Shock table tests were performed on the recycled aggregate concrete to determine the quality of concrete concerning its consistency, as shown in Fig. 6, cohesiveness and its proneness to segregation. The reference value for the normal concrete was 40.5 cm and a slight decreasing behavior in the shock table test values was accompanied by ...
The ability of a recycled aggregate to absorb more water is due to the high presence of the adhered mortar onto the aggregate's surface which, ... aggregate should be 2.3 or higher, and a maximum mortar content and water absorption of 50% and 3%, respectively. This limit in water absorption is hard to follow in practice, and the effects of RA ...
