قائمة الطعام
See more on ijcsm.springeropen
WEBFractional factorial experimental design to study how different parameters affect concrete strength using low-strength (6–13 MPa) bricks as aggregates. The …
Equations for Predicting Flexural Strength and Compressive Strength of Plastic Concrete Pavement Blocks. The influence of plastic content within the range of 0% - 60% as replacement for sand volume, water cement (w/c) ratio of 0.30 – 0.50 and curing age of 7 days – 28 days on flexural strength and….
Google 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 Construction …
Journal of Civil Engineering and Management. The use of recycled concrete aggregate (RCA) in concrete as partial and full replacements of natural coarse aggregate is growing interest in the construction industry, as it reduces the demand for aggregate. In addition, the use of RCA leads to a possible solution to the environmental …
1 Introduction. Utilizing recycled aggregate is certainly an important step towards sustainable development in the concrete industry and management of …
Experimental 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 …
Abstract. A summary of the more relevant studies and the different applications of ceramic recycled aggregates in construction have been dealt in this …
1. Background. Concrete is the most-used building material globally, with global consumption of about 12 billion tons annually [].Concrete generally comprises 10–20% cement, 70–80% natural aggregate (NA), and 5–10% water by mass [].The massive demand for concrete has led to the overexploitation of high-quality river sand …
Research Article | December 15 2023. Using and optimizing the recycled aggregates in concrete: A review. Yasir H. Mohammed; Alyaa A. Al-Attar; Firas Kh. …
This study provides a comprehensive review on recycled aggregate (RA) and recycled aggregate concrete (RAC) regarding their history, recycling, reuse and manufacture process, inherent defects (e.g. existing of additional interfacial transition …
Dolomite and granodiorite are among the aggregates traditionally used in mineral-asphalt mixtures. On the basis of earlier studies [], it was assumed that 20% to 30% of the addition of ceramic waste aggregate can be used as a substitute for aggregates traditionally used in mineral-asphalt mixtures used for construction of road surfaces.The …
The quantity requirement and e-waste concrete with Si for each specimen for casting is done through volumetric batching. The design mix of M25 of 1:1:2 as per IS 455:2000 and IS 383–1970.The e-waste is replaced in the coarse aggregate of concrete by 12 % and strength has been analysed through testing specimens on 7, 14, 28 days.
1. Introduction. Generally, concrete containing around 65–85% of its volume by aggregate. Meaningful that the properties of concrete are mainly dependent on the quality and type of aggregate [1].It is completely known that aggregate is an inactive material, but it is actually inactive due to its physical and limited chemical properties that …
: 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 …
Similarly, Heeralal et al. [14] found negative effects on concrete when using RA compared to NA. Quiasrawi and Marie [15] discovered that concrete using aggregate that had been recycled twice (2nd generation) had greater properties compared to concrete using aggregate that had only been recycled once (1st generation).
This paper reports the investigation of the properties of Lightweight Concrete (LWC) made from Portland cement and diatomite aggregate. The chemical and physical properties of diatomite and the mechanical properties of LWC with regard to the effects of calcined temperature and gradation were studied. The uncalcined diatomite …
The 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 ...
This paper aims to investigate the possibility of utilizing steel slags produced in Croatian plants as a concrete aggregate. Aggregate properties were determined on coarse slag fractions (4–8, 8–16 mm) according to the relevant European Standards. Considering the obtained results, slags were specified in accordance with the classes as …
Main challenging issues for natural concrete aggregate Malaysia is extremely fortunate to have several distributed natural aggregate resources, with almost every state carrying out its own quarry and aggregate production activities. Table 1 shows the total production of aggregates from 2005 to 2007 according to states. ... Google …
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. This paper examines strength and toughness properties of …
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 …
In addition, methods for enhancing the mechanical characteristics of recycled aggregate and long-term efficiency such as improving the properties without modifying the recycled aggregate (namely, different concrete mixing designs and the addition of reinforcing fibers) were reviewed.
DOI: 10.1016/J.RESCONREC.2018.02.005 Corpus ID: 115358675; Properties of recycled concrete aggregate and their influence in new concrete production @article{Verian2018PropertiesOR, title={Properties of recycled concrete aggregate and their influence in new concrete production}, author={Kho P. Verian and Warda Ashraf …
Youm 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.
1. 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 …
Lightweight concrete has a history of more than two-thousand years and its technical development is still proceeding. This review starts with a retrospective that gives an idea of the wide range of applications covered by lightweight concrete during the last century. Although lightweight concrete is well known and has proven its technical …
Engineering, Materials Science. 1986. 2,915. The 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 …
Using recycled aggregates may have an adverse effect on physical, mechanical and durability characteristics by decreasing workability and compressive strength, more abrasion loss and extending the setting time. Additionally, the research demonstrates that geopolymer concrete made with recycled aggregates has a denser, …
Tabsh, S.W., Abdelfatah, A.S.: Influence of recycled concrete aggregates on strength properties of concrete. Constr. Build. Mater. 23, 1163–1167 (2009) Article Google Scholar UNI EN 12620: 2008 Aggregates for concrete. Google Scholar UNI 8520-1: 2015 Aggregates for concrete.
Actually, it is estimated that concrete production is responsible for 9% of total greenhouse gas emissions [23], of which 7–8% from only cement plants [24].In other words, if the concrete industry was a country, it would be the third largest CO 2 emitter in the world with up to 2.8 Gt per year, surpassed only by China (10.18 Gt) and the United States …
حقوق النشر ©2000- 2024 شركة شنغهاي زينيث
