Destructive Horizontal Load Tests of Full-Scale Recycled-Aggregate Concrete Structures

2015 ◽  
Vol 112 (6) ◽  
Author(s):  
João Pacheco ◽  
Jorge de Brito ◽  
João Ferreira ◽  
Diogo Soares
Keyword(s):  
Concrete Structures ◽  
Full Scale ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Horizontal Load ◽  
Aggregate Concrete ◽  
Load Tests

Cyclic load tests and seismic performance of recycled aggregate concrete (RAC) columns

2019 ◽  
Vol 195 ◽  
pp. 682-694 ◽  
Author(s):  
Chao Liu ◽  
Jincheng Fan ◽  
Guoliang Bai ◽  
Zonggang Quan ◽  
Guangming Fu ◽  
...  
Keyword(s):  
Seismic Performance ◽  
Cyclic Load ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Aggregate Concrete ◽  
Load Tests

Investigation on Seismic Behavior of Recycled Aggregate Concrete Structures under Dynamic Loadings

2013 ◽  
Vol 772 ◽  
pp. 149-155
Author(s):  
Chang Qing Wang
Keyword(s):  
Seismic Behavior ◽  
Fatigue Behavior ◽  
Experimental Studies ◽  
Concrete Structures ◽  
Recycled Aggregate Concrete ◽  
Shaking Table ◽  
Frame Structure ◽  
Recycled Aggregate ◽  
Scale Model ◽  
Aggregate Concrete

Based on the ever finished investigations of physical and mechanical properties of recycled aggregate concrete (RAC), and a series of experimental studies on the durability, the fatigue behavior, mechanical behavior and the seismic behavior of RAC components. A full scale model of a one-storey block masonry structure with tie column + ring beam + cast-in-place slab system and a one fourth scaled model of a 6-storey frame structure, which are made of reinforced recycled aggregate concrete, are tested on a shaking table by subjecting it to a series of simulated seismic ground motions, and the seismic behaviors of the RAC structures were experimentally investigated. The dynamic characteristics and the seismic response were analyzed and discussed. The overall seismic performance of RCA structures are evaluated, the analysis results show that the recycled aggregate concrete structures with proper design exhibits good seismic behavior and can resist the earthquake attacks under different earthquake levels in this study. It is feasible to apply and popularize the RAC block masonry buildings less than 2 stories and the RAC frame buildings less than 6 stories in the region where the seismic fortification intensity is 8.

Application of Molten Slag Fine Aggregate Concrete Using Superplasticizer

2006 ◽  
Vol 302-303 ◽  
pp. 329-338
Author(s):  
Shuzo Otsuka ◽  
Yoshihisa Nakata ◽  
Takeshi Saito ◽  
Hiroki Takahashi ◽  
Keishi Tobinai ◽  
...  
Keyword(s):  
Molten Slag ◽  
Full Scale ◽  
Recycled Concrete ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Hardened Concrete ◽  
Fine Aggregate ◽  
Aggregate Concrete ◽  
Significant Difference

With increasing number of melting-solidification plants for the domestic wastes and incineration ashes, the resulting molten slag is now expected as a recycled aggregate for concrete in Japan, while application examples until now are limited to non-loadbearing pre-cast concrete and concrete secondary products. This study deals with a full-scale application of molten slag recycled fine aggregate. Starting with the inspection of monthly variations in quality of molten slag fine aggregate in a plant, construction of a full-scale structure was attempted using the recycled aggregate concrete with a superplasticizer. During construction, pumpability of the recycled concrete was examined and the quality of hardened concrete in the structure was evaluated. It was shown that quality variation of the molten slag fine aggregate during eight months was sufficiently small, and pumpability as well as concrete quality in structure showed no significant difference with those of the ordinary concrete.

scholarly journals New Eurocode 2 provisions for recycled aggregate concrete and their implications for the design of one-way slabs

2021 ◽  
Vol 64 (2) ◽  
pp. 119-125
Author(s):  
Nikola Tošić ◽  
Jean Torrenti
Keyword(s):  
Structural Design ◽  
Parametric Study ◽  
Concrete Structures ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Concrete Slabs ◽  
Structural Level ◽  
Aggregate Concrete ◽  
Structural Resistance ◽  
Eurocode 2

A significant amount of research has been performed on recycled aggregate concrete (RAC), both on the material and structural level. This has enabled the formulation of material and structural resistance models that can be safely and reliably used for the structural design of RAC members and the new Eurocode 2 (EC2) will contain an informative annex detailing provisions for the design of RAC. Thus, an increased market uptake of recycled aggregate (RA) can be achieved, leading to potential sustainability improvements of concrete structures. In order to familiarize designers with the new provisions for RAC, this paper presents an example of one-way slab design using varying RA substitution ratios, as well as a parametric study on the implications of RAC provisions on slab slenderness. The results of this study show that RAC one way slabs can be successfully designed using EC2. Although such slabs might require larger depths than natural aggregate concrete slabs, their applicability in the typical slenderness range is possible.

scholarly journals Evaluating the durability of recycled concrete made of coarse recycled aggregate concrete containing silica-fume and natural zeolite

2020 ◽  
Vol 19 (3) ◽  
pp. 457-473
Author(s):  
Hasan Jalilifar ◽  
◽  
Fathollah Sajedi ◽  
Vahid Razavi Toosi ◽  
◽  
...  
Keyword(s):  
Water Absorption ◽  
Silica Fume ◽  
Natural Zeolite ◽  
Full Scale ◽  
Recycled Concrete ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Conventional Concrete ◽  
Aggregate Concrete ◽  
Four Levels

This experimental study evaluates the durability of recycled aggregate concrete (RAC) containing silica-fume (SF) and natural zeolite (NZ). For this purpose, four levels of recycled coarse concrete aggregates (RCA) were replaced with natural coarse aggregates (NCA). To compare the effect of pozzolans, three levels of SF (5%, 10%, and 15%) and three levels of NZ (10%, 20%, and 30%) were replaced with cement. To evaluate the durability of RAC, 28 mixed designs were made and the following were measured: compressive strength (CS), water absorption by immersion (WA by immersion), water absorption by capillary (WA by capillary), electrical resistance (ER), electrical conductivity (EC) and rapid chloride penetration test (RCPT). The results indicated that WA by immersion and WA by capillary of RAC increased with enhanced RCA incorporation. On the other hand, the pozzolanic reaction of 10% of SF and 10% of NZ decreased capillary pores and structural weakness of full-scale RAC. However, due to the internal chemical changes of RAC, contrary to the WA by immersion and WA by capillary, compared to conventional concrete (CC), a lower EC and unchanged ER values of RC100 containing pozzolans were seen. The scanning electron microscopy (SEM) revealed that compared to NZ, a 10% of SF significantly improved the microstructure of full scale RAC.

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