Use of recycled aggregate in concrete can be useful for environmental protection. Recycled aggregates are the materials for the future. The application of recycled aggregate has been started in a large number of construction projects of many European, American, Russian and Asian countries. Many countries are giving …
WhatsApp: +86 18221755073Lightweight aggregate concrete mixtures incorporating 0, 10, 20, and 30 weight percent replacement of normal-weight aggregate with lightweight aggregate and crushed stone as fine aggregate were tested at 7, 28, 56, and 90 days for various strength and durability characteristics of hardened concrete. ... Google Scholar. Aghhayere, A. …
WhatsApp: +86 18221755073: The recent increase in structural developments worldwide, has given rise to the consumption of natural aggregates and energy hence generating a vast amount of construction and demolition waste. Natural aggregates occupy 60-75 percent in volume of the concrete matrix. It is beneficial to recycle construction and demolition waste, for …
WhatsApp: +86 18221755073This study provides a comprehensive review on recycled aggregate (RA) and recycled aggregate concrete (RAC) regarding their history, recycling, reuse and …
WhatsApp: +86 18221755073Due to population growth and industrial development, waste generation has increased annually over the last few years. According to a World Bank report, in 2018, about 2.01 billion tons of municipal solid waste were generated, and this amount was predicted to grow to 3.40 billion tons by 2050 (Kaza et al 2018). Waste glass (WG) is among the largest …
WhatsApp: +86 18221755073Semantic Scholar extracted view of "Strength of Recycled Concrete MadeFrom Crushed Concrete Coarse Aggregate" by T. Hansen et al. ... Corpus ID: 138462057; Strength of Recycled Concrete MadeFrom Crushed Concrete Coarse Aggregate @article{Hansen1983StrengthOR, title={Strength of Recycled Concrete MadeFrom …
WhatsApp: +86 18221755073Recycled plastic aggregate (RCPA) is being used as coarse aggregates in concrete in current research. This will not only help to lower the cost of coarse aggregates (CA), but it will also save a lot of energy during production, paving the way for sustainable development by reducing the burden on natural resources. ... Article Google Scholar ...
WhatsApp: +86 18221755073Experimental work was carried out to study the effect of using steel slag (SS) and recycled concrete aggregate (RCA) as replacements for the natural aggregate in concrete. Waste materials, such as SS, which is a by-product generated during the production of steel and concrete rubble, which is produced by demolition activities, are dumped in landfill. …
WhatsApp: +86 18221755073The inclusion of fiber in concrete influenced the mobility of concrete in the fresh state by acting as a barrier to the movement of coarse aggregate. It was observed that the concrete with an FA/CA ratio above 0.8 showed better flowability in the fresh state, whilst an above 0.9 FA/CA ratio requires excessive superplasticizer to maintain the ...
WhatsApp: +86 18221755073Hebhoub 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 …
WhatsApp: +86 18221755073Introduction. Concrete, as a major construction material, relies heavily on the quality of its components for optimal performance. Among these components, fine aggregates play a pivotal role, significantly influencing strength and stability (Khadka et al., Citation 2022; Quayson & Mustapha, Citation 2019).The diversity in fine aggregate …
WhatsApp: +86 18221755073[87] claimed that if aggregate recycled from high strength class concrete which was featured for good quality, there was no impacts from the replacement ratio on the quality of concrete [18]. suggested a limit of 30% of recycled coarse aggregate and 10%–20% of recycled fine aggregate in concrete [27]. concluded that concrete with …
WhatsApp: +86 18221755073This research investigated high calcium fly ash geopolymer stabilized recycled concrete aggregate (RCA-FAG) as pavement base material. The effect of recycled concrete aggregate (RCA):high calcium fly ash (FA) ratios, sodium silicate (Na 2 SiO 3):sodium hydroxide (NaOH) ratio, and curing time on the unconfined compressive strength (UCS) …
WhatsApp: +86 18221755073A review of life cycle assessment of recycled aggregate concrete. Construction and Building Materials, 209, 115–125. Article Google Scholar Ding, T., Xiao, J., & Tam, V. W. (2016). A closed-loop life cycle assessment of recycled aggregate concrete utilization in China. Waste Management, 56, 367–375.
WhatsApp: +86 18221755073Using Recycled Aggregate (RA) for new high performance concrete (HPC) could be an environmentally friendly solution [8], [9], [10]. HPC is a cementitious …
WhatsApp: +86 182217550731. Introduction. Concrete is the second most used material by volume on Earth. Portland cement is the main binder of concrete, and its production (estimated at 4.3 bi ton/year) accounts for about 8% of the global CO 2 emission [].Besides the CO 2 emission released by cement production, large amounts of sand and gravel are …
WhatsApp: +86 18221755073This study was conducted to evaluate the concrete hollow block (CHB) with coco coir fiber in aggregates. As technology innovation, coco coir fiber was incorporated as one of the aggregates in CHB making. The quality attributes of the aggregates were assessed in terms of sieve analysis, moisture content, unit weight/mass determination, …
WhatsApp: +86 18221755073Influence of Amount of Recycled Coarse Aggregates and Production Process on Properties of Recycled Aggregate Concrete @article{Etxeberria2007InfluenceOA, title={Influence of Amount of Recycled Coarse Aggregates and Production Process on Properties of Recycled Aggregate Concrete}, …
WhatsApp: +86 18221755073Google Scholar [6] Hannawi K, Kamali-Bernard S and Prince W 2010 Physical and mechanical properties of mortars containing PET and PC waste aggregates Waste Management 30 2312-2320. Crossref Google Scholar [7] Poon C S, Kou S C and Lam L 2002 Use of recycled aggregates in molded concrete bricks and blocks …
WhatsApp: +86 18221755073The construction industry generates tons of waste annually worldwide, causing a significant impact on the environment. The massive accumulation of construction and demolition waste exacerbates this problem, particularly in countries like Peru where the construction industry is rapidly growing. This research proposes addressing this …
WhatsApp: +86 18221755073Accumulations 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. This paper examines strength and toughness properties of concrete in which …
WhatsApp: +86 18221755073The use of recycled aggregates in concrete opens a whole new range of possibilities in the reuse of materials in the building industry. The utilisation of recycled aggregates is a good solution to the problem of an excess of waste material, provided that the desired final product quality is reached. The studies on the use of recycled …
WhatsApp: +86 182217550731. Introduction. Concrete is an everyday material; its adaptability and availability have made it of great importance for all construction in the world (Bamigboye et al., Citation 2019).Concrete in volume terms is among the most widely used synthetic materials (Martínez-García et al., Citation 2017; Sojobi et al., Citation 2016).Much …
WhatsApp: +86 18221755073Youm KS, Moon J, Cho JY, Kim JJ (2016) Experimental study on strength and durability of lightweight aggregate concrete containing silica fume. Constr Build Mater 114:517–527. Article Google Scholar Chandra S, Berntsson L (2002) Lightweight aggregate concrete science, technology and applications.
WhatsApp: +86 182217550731. Introduction. Concrete is a widely consumed construction material second to water in the world, accounting for nearly 30 billion tons per year due to its low price and ease of preparation [1], [2], although it is a complex and multi-phase material [3].When cement reacts with water, chemical reactions called 'hydration' occur slowly and …
WhatsApp: +86 18221755073Abstract This study focused on the problem of recycling construction and demolition wastes as well as industrial waste by-products into sustainable concrete materials. By combining addition of three different industrial waste by-products, an environmentally friendly recycled aggregate self-compacting concrete (RA-SCC) mix …
WhatsApp: +86 18221755073Therefore green concrete can be in various types; such as concrete with partial to total replacement of OPC as a binder, or/and concrete incorporating waste and recycled materials as aggregate [8].Apart from sustainability issues, the necessity to have concrete that is strong and durable has propelled the development of green concrete …
WhatsApp: +86 18221755073In this work, an experimental analysis is described of specimens of recycled concrete (RC) made with replacement of natural aggregate with recycled aggregate originating from concrete (RCA). An experimental analysis to obtain the shrinkage and creep properties (basic and by drying) of RC was performed. The replacement fraction …
WhatsApp: +86 18221755073This study proposes the hybrid machine learning model combining random forest and Taguchi optimization (RF-TGC) to predict the shear strength of recycled reinforced concrete beams (RARC). For this objective, a total of 128 experimental results of shear strength of RARC beams from published papers were used to develop the …
WhatsApp: +86 18221755073This paper discusses the properties of RCA, the effects of RCA use on concrete material properties, and the large scale impact of RCA on structural members. The review study yielded the following findings in regards to concrete material properties: (1) replacing NA in concrete with RCA decreases the compressive strength, but yields …
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