ويركزمعهد بحوثالعامة لليمينغ الصناعة الثقيلةفي مجال البحوث وتطوير التكنولوجيا المتقدمة والمنتجات الموجهة لصالح العملاء، فضلا عن بناءالقدرة التنافسية الجوهريةليجعل يمينغالصناعة الثقيلةرائدةفي هذه الصناعة.من خلال توفيرنتائج البحوثالأساسية، ويدعم المعهديمينغالصناعة الثقيلةالتكنولوجيا والمنتجات لتكون أعلىمنهافي العالمالقائمة.
1990-12-1 · Selection of suitable mix design procedure for recycled aggregate concrete. Phase II1: Trial mixes of recycled aggregate concrete and identification of influencing parameter. Phase IV: Proposed modification in the light of the parameter thus identified. Phase i Work Natural aggregate concrete of M15 grade was designed and sufficient number of ...
دردشة على الإنترنت2020-10-30 · This paper demonstrates that RSM can be used to design the mix proportion of recycled aggregate pervious concrete. From the perspective of the internal structure of recycled permeable concrete, the factors affecting its strength and porosity are the paste properties, the coating thickness of paste on the surface of aggregate and the void content of aggregate.
دردشة على الإنترنت2014-8-26 · This work is devoted to the study of fresh and hardened properties of concrete containing recycled gravel. Four formulations were studied, the concrete of reference and three concretes containing recycled gravel with 30, 65 and 100 % replacement ratios. All materials were formulated on the basis of S4 class of flowability and a target C35 class of compressive
دردشة على الإنترنت2016-9-30 · Abstract. This paper proposes a conceptual formulation for predicting and controlling the compressive strength of Recycled Aggregate Concrete (RAC) mixtures, by explicitly taking into account the specific features of Recycled Concrete Aggregates (RCAs). In fact, since RCAs are significantly more porous than Natural Aggregates (NAs), the mix ...
دردشة على الإنترنت2012-11-27 · 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 and recycled concrete aggregate for
دردشة على الإنترنت2022-2-2 · This paper is devoted to the studies of material and mechanical properties of recycled aggregate concrete using packing density method. This paper considers mix of two different aggregate sizes of ...
دردشة على الإنترنت2021-4-26 · This paper puts forward a strength-based mix design method for recycled aggregate concrete using a modified empirical formula. A total of 30 mixes, the amount of cement varies from 300 kg/m 3 to 500 kg/m 3 and the proportion of recycled coarse aggregate ranges from 0% to 100%, were prepared for the regression analysis of relationships between multiple parameters.
دردشة على الإنترنتInternational Journal of Concrete Structures and Materials Vol.6, No.4, pp.239–246, December 2012 DOI 10.1007/s40069-012-0024-x ISSN 1976-0485 / eISSN 2234-1315 Mix Design for Pervious Recycled Aggregate Concrete Rasiah Sriravindrarajah1),*, Neo Derek Huai Wang2), and Lai Jian Wen Ervin2) (Received August 29, 2012, Accepted November 6, 2012, Published
دردشة على الإنترنتThis paper presented an experimental work have been done to determine the effects of recycled concrete aggregate (RCA) under the curing conditions of 2.1 pH in sulphuric acid (H2 SO4 ) and 0.5 N ...
دردشة على الإنترنت2020-8-11 · The undesirable properties of conventional recycled fine aggregate (RFA) often limit its application in the construction industry. To overcome this challenge, a method for preparing completely recycled fine aggregate (CRFA), which crushes all concrete waste only into fine aggregate, was proposed. The obtained CRFA had high apparent density, and its water
دردشة على الإنترنتRATIONAL MIX DESIGN APPROACH FOR RECYCLED AGGREGATE CONCRETE Marco Pepe (1), Romildo D. Toledo Filho (2), Eduardus A.B. Koenders (3), Enzo Martinelli (1)
دردشة على الإنترنتThe undesirable properties of conventional recycled fine aggregate (RFA) often limit its application in the construction industry. To overcome this challenge, a method for preparing completely recycled fine aggregate (CRFA), which crushes all concrete waste only into fine aggregate, was proposed. Th
دردشة على الإنترنت2022-2-2 · This paper is devoted to the studies of material and mechanical properties of recycled aggregate concrete using packing density method. This paper considers mix of two different aggregate sizes of ...
دردشة على الإنترنتmix design procedure for recycled aggregate concrete Conservation of natural resources and preservation of environment is the essence of any development. Use of recycled aggregate concrete (RAC) is one such attempt and is an answer to
دردشة على الإنترنت2020-8-11 · The undesirable properties of conventional recycled fine aggregate (RFA) often limit its application in the construction industry. To overcome this challenge, a method for preparing completely recycled fine aggregate (CRFA), which crushes all concrete waste only into fine aggregate, was proposed. The obtained CRFA had high apparent density, and its water
دردشة على الإنترنت2022-2-7 · The physio-chemical changes in concrete mixes due to different coarse aggregate (natural coarse aggregate and recycled coarse aggregate (RCA)) and mix design methods (conventional method and ...
دردشة على الإنترنتHighlights•Application of response surface methodology for mix design of recycled aggregate pervious concrete.•Explanation of Ideal paste thickness (IPT), actual coating thickness (ACT) and the void content (TVC).•Establishment of IPT and ACT response models ...
دردشة على الإنترنت2020-8-11 · The undesirable properties of conventional recycled fine aggregate (RFA) often limit its application in the construction industry. To overcome this challenge, a method for preparing completely recycled fine aggregate (CRFA), which crushes all concrete waste only into fine aggregate, was proposed. The obtained CRFA had high apparent density, and its water
دردشة على الإنترنت2020-6-18 · This paper demonstrates that RSM can be used to design the mix proportion of recycled aggregate pervious concrete. From the perspective of the internal structure of recycled permeable concrete, the factors affecting its strength and porosity are the ...
دردشة على الإنترنت2015-5-25 · The effects of the UFS and NS mineral admixtures produced greater performance improvements in the concrete than the recycled coarse aggregate. Finally, the optimal mix proportion was determined. For this mix, the thermal conductivity coefficient and compressive strength of the concrete were 0·305 W/(m.K) and 46·7 MPa respectively.
دردشة على الإنترنتThe undesirable properties of conventional recycled fine aggregate (RFA) often limit its application in the construction industry. To overcome this challenge, a method for preparing completely recycled fine aggregate (CRFA), which crushes all concrete waste only into fine aggregate, was proposed. Th
دردشة على الإنترنتmix design procedure for recycled aggregate concrete Conservation of natural resources and preservation of environment is the essence of any development. Use of recycled aggregate concrete (RAC) is one such attempt and is an answer to
دردشة على الإنترنتmix design for recycled aggregaye concrete
The undesirable properties of conventional recycled fine aggregate (RFA) often limit its application in the construction industry. To overcome this challenge, a method for preparing completely recycled fine aggregate (CRFA), which crushes all concrete waste only into fine aggregate, was proposed. The obtained CRFA had high apparent density, and its water absorption was lower
دردشة على الإنترنت2020-6-18 · This paper demonstrates that RSM can be used to design the mix proportion of recycled aggregate pervious concrete. From the perspective of the internal structure of recycled permeable concrete, the factors affecting its strength and porosity are the ...
دردشة على الإنترنتThis paper is devoted to the studies of material and mechanical properties of recycled aggregate concrete using packing density method. This paper considers mix of two different aggregate sizes of 10 and 20mm, 0, 30, 50, 70 and 100% recycled aggregate replacement ratios, and water-cement ratio of 0.35, 0.45 and 0.55.
دردشة على الإنترنتThis article is on the development of a mix design method for self-compacting recycled aggregate concrete (SCRAC) by considering the adhered mortar content (AMC) on the surface of the aggregate. In this method of mix design, the acceptable percentage of recycled concrete aggregate (RCA) depends on the AMC value.
دردشة على الإنترنت2020-3-7 · The empirical inter-relationships developed among porosity, compressive strength and water permeability could be used in the mix design of pervious concrete with either natural or recycled concrete aggregates to meet the specification requirements of compressive strength and water permeability. en: dc.format.extent: 8 p. en: dc.language.iso: en: en
دردشة على الإنترنت2012-1-1 · The compressive strength of pervious concrete increased with a reduction in the maximum aggregate size from 20 to 13 mm. The relationship between 28-day compressive strength and porosity for pervious concrete was adversely affected by the use of recycled concrete aggregate instead of natural aggregate.
دردشة على الإنترنتThe major difficulty is due to the variability of the aggregate properties, and the lack of a robust methodology able to accurately evaluate the mechanical performance of the recycled concrete. This work aims to develop a new mix design method using an approach based on the combination of experimental techniques and numerical simulation as ...
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