Influence of coating recycled aggregate surface with pozzolanic powder on properties of recycled aggregate concrete

Li, Jiusu; Xiao, Hanning; Zhou, Yong

doi:10.1016/j.conbuildmat.2008.07.019

Cited by 315 publications

(90 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It might be due to treatment solution type G contained a certain amount of sodium hydroxide as the alkaline activator for pozzolanic and sodium silicate, the amount of sodium hydroxide incompletely reacted with sodium silicate and pozzolanic powder, which caused a negative effect on the mechanical properties of the new concrete [30]. The compressive strength of RAC treated with SSF, SMK, and SFA enhanced about 28-36%, 13-29%, and 23-28% compared to that of untreated RAC, respectively, which is significantly higher than other observations in [10], [31]. It can be seen that the concentration of treatment solution considerably affected the compressive strength of RAC.…”

Section: Compressive Strengthmentioning

confidence: 39%

Enhancement of Recycled Aggregate Concrete Properties by a New Treatment Method

Bui

Satomi

Takahashi

2018

GEOMATE

View full text Add to dashboard Cite

ABSTRACT:Recently, decreasing natural sources of aggregate accompanied by increasing large quantities of construction and demolition waste (CDW) cause challenges for environment and construction industry. A significant solution for this is to recycle CDW as a new aggregate source for concrete. However, using recycled concrete aggregate (RCA) in concrete involves various obstacles and controversial issues in controlling the quality of recycled aggregate concrete (RAC). This study is an effort to improve the quality of RAC containing 100% coarse RCA by using pozzolanic and sodium silicate solution as new treatment solutions. This study examined performance abilities of RAC after being treated with new treatment solutions and a new mixing procedure. The mechanical properties of RAC were evaluated based on testing of concrete under various conditions. The significant results indicated that sodium silicate combined with pozzolanic materials can improve mechanical properties of RAC containing 100% coarse RCA. At 20% concentration of sodium silicate and silica fume, the compressive strength of RAC could improve up to 36%. Achievements of this approach demonstrated its effectiveness in enhancing the strength of RAC, which is potentially applied to treating RCA for concrete in the future.

show abstract

Section: Compressive Strengthmentioning

confidence: 39%

Enhancement of Recycled Aggregate Concrete Properties by a New Treatment Method

Bui

Satomi

Takahashi

2018

GEOMATE

View full text Add to dashboard Cite

show abstract

“…Aiming at improving the performance of RAC, other researchers have examined the utilization of ne and ultra ne reactive cementitious materials such as y ash, ground granulated blast furnace slag, and silica fume in RAC [1,5,10,[12][13][14]. It is reported that these materials help to improve the performance of RAC due to the pozzolanic reaction and the lling ability resulting in a dense microstructure and strong ITZ [1,9,10].…”

Section: Introductionmentioning

confidence: 99%

Feasibility of Using Nanoparticles of SiO₂ to Improve the Performance of Recycled Aggregate Concrete

Younis

Mustafa

2018

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

e aim of this paper was to examine the feasibility of using nanoparticles of SiO 2 (nanosilica) to improve the performance of recycled aggregate concrete (RAC) containing recycled aggregate (RA) derived from processing construction and demolition waste of concrete buildings. e examined properties include compressive strength, splitting tensile strength, and water absorption. e study also includes examining the microstructure of RA and RAC with and without nanoparticles of SiO 2 . In total, nine mixes were investigated. Two mixes with RA contents of 50% and 100% were investigated and for each RA content; three mixes were prepared with three different nanoparticles dosages 0.4%, 0.8%, and 1.2% (by mass of cement). A control mix with natural aggregate (NA) was also prepared for comparison reasons. e results show that nanoparticles of silica can improve the compressive strength, tensile strength, reduce the water absorption, and modify the microstructure of RAC.

show abstract

“…On the other hand, the demand for transportation keeps increasing while population continues to grow. In the USA, about 30 million tons of concrete has to be discarded each year (Li et al, 2009). The need to replace old infrastructure with new one has become a priority.…”

Section: Introductionmentioning

confidence: 99%

Bond behavior between steel bar and recycled aggregate concrete after freeze–thaw cycles

Shang

Zhao

Cao

2015

Cold Regions Science and Technology

View full text Add to dashboard Cite

Influence of coating recycled aggregate surface with pozzolanic powder on properties of recycled aggregate concrete

Cited by 315 publications

References 20 publications

Enhancement of Recycled Aggregate Concrete Properties by a New Treatment Method

Enhancement of Recycled Aggregate Concrete Properties by a New Treatment Method

Feasibility of Using Nanoparticles of SiO₂ to Improve the Performance of Recycled Aggregate Concrete

Bond behavior between steel bar and recycled aggregate concrete after freeze–thaw cycles

Contact Info

Product

Resources

About

Influence of coating recycled aggregate surface with pozzolanic powder on properties of recycled aggregate concrete

Cited by 315 publications

References 20 publications

Enhancement of Recycled Aggregate Concrete Properties by a New Treatment Method

Enhancement of Recycled Aggregate Concrete Properties by a New Treatment Method

Feasibility of Using Nanoparticles of SiO2 to Improve the Performance of Recycled Aggregate Concrete

Bond behavior between steel bar and recycled aggregate concrete after freeze–thaw cycles

Contact Info

Product

Resources

About

Feasibility of Using Nanoparticles of SiO₂ to Improve the Performance of Recycled Aggregate Concrete