ACI Global Home Middle East Region Portal Western Europe Region Portal
Email Address is required Invalid Email Address
In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Learn More
Become an ACI Member
Topics In Concrete
Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Showing 1-5 of 20 Abstracts search results
Document:
SP330
Date:
October 2, 2018
Author(s):
Tongbo Sui, Terence C. Holland, Ziming Wang, Xiaolong Zhao
Publication:
Symposium Papers
Volume:
330
Abstract:
In October 30 to November 2, 2018, the CCS and the China Academy of Building Research (CABR), Beijing China, in association with the COIC sponsored the Fourteenth International Conference on Recent Advances in Concrete Technology and Sustainable Issues in Beijing, China. The proceedings of the Conference consisting of 19 refereed papers were published by the ACI as SP 330. In addition to the refereed papers, more than 52 papers were presented at the conference, and these were published in the supplementary papers volume.
DOI:
10.14359/51712248
SP-330-18
September 26, 2018
Baoliang Li, Binbin Huo, and Yamei Zhang
To meet the requirements of building industrialization of construction, steam curing is widely used to produce concrete elements in factories in China. However, there are few reports relating to the properties of steam cured concrete under dry-wet cycle and sulfate attack. The performance of steam cured (80°C (176°F) for 7h) GGBFS blended cement mortar (20% cement is substituted by GGBFS) under sulfate attack and dry-wet cycle condition were investigated. Under dry-wet cycle, both steam cured and standard cured GGBFS mortar present worse sulfate resistance compared with those of pure cement mortar. However, early age steam curing improves the sulfate resistance of GGBFS mortar, but decreases the sulfate resistance of pure cement mortar. The formation of hemicarbonate and C-A-S-H under steam curing seems to be beneficial for protecting against the sulfate attack of cement mortar, but the coarse pore structure caused by steam cuing is harmful to the sulfate resistance of cement mortar.
10.14359/51711252
SP-330-19
Ji-Hua Zhu, Zhi Wang, Wanqian Li, Hanshi Liang, Zhiwen Zeng, Mei-ni Su, Dawang Li, and Feng Xing
With the rapid development of economy and infrastructure, more and more new reinforced concrete (RC) structures are being constructed every day, with the increasing demand for raw materials, such as sands, cement and aggregates. One solution to materials can cause resource shortage is to use sea sand to replace river sand. However, sea sand concrete might cause corrosion of steel re-bars in RC structures, thus resulting in structure deterioration. This study proposes a new dual-functional method to retrofit the sea-sand RC structures by using the carbon - fiber reinforced cementitious matrix (C-FRCM). The C-FRCM composite, consists of carbon fiber mesh and inorganic cementitious material, is both the anodic material in the impressed current cathodic protection process as well as the structural strengthening material. The proposed technique has been shown to be effective in retarding the corrosion of re-bars, and maintaining the loading capacity of the corroded specimens.
10.14359/51711253
SP-330-14
Sean Monkman
Meeting the cement and concrete industry sustainability goals requires approaches that simultaneously reduce associated carbon emissions and satisfy the increasing demand for concrete. The beneficial use of carbon dioxide in ready mixed concrete production has been developed and installed as a retrofit technology with industrial users. Extended operation has investigated the environmental benefit. An optimum dose of CO2 is added to ready mixed concrete during mixing and batching; increased compressive strength prompts a producer to optimize their mix designs. The use of carbon dioxide along with a lower cement usage reduces the carbon footprint of concrete. One year of production saw an industrial user employ 9.4 tons (8.5 tonnes) of CO2, and realize a savings of more than 449 tons (408 tonnes) of cement. Including the process emissions required to implement the technology, there was a net 488 tons (443 tonnes) of CO2 emissions avoided.
10.14359/51711248
SP-330-15
Wen Zhou, Yongxiang Zhou, Peng Feng, Zuqi Wang, Jing Wang, and Putao Song
Preparing concrete with coral gravel and coral sand as aggregates is of great significance for the construction of offshore islands short of building materials. LC30 and LC50 coral aggregate concrete (CAC) using aggregate from South China Sea were prepared and basic properties of CAC were studied and compared with ordinary concrete (OC) and lightweight aggregate concrete (LAC). The results show that prewetting aggregates improves the compressive strength of CAC with low water-cement ratio (w/c). With the same level of cube compressive strength (fcu), the compressive strength (fc) of CAC is higher than that of OC and LAC, the splitting tensile strength (fsp) of CAC is close to that of OC and higher than that of LAC, the elastic modulus (Ec) of CAC is between that of OC and LAC. Test results on durability properties show that 3-day shrinkage of CAC is 43% of OC; and CAC’s ability to resist chloride diffusion is inferior to OC but better than LAC.
10.14359/51711249
Results Per Page 5 10 15 20 25 50 100
Edit Module Settings to define Page Content Reviewer