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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-330-19
September 26, 2018
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-330-18
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-330-17
Dongmin Wang and Dawang Zhang
This work aims to investigate the buildability of geopolymer printing materials with silicon-to-aluminum (Si/Al) from 4.5-5.5 were prepared by addition different content of steel slag into printing materials matrix. Effects of Si/Al on the buildability of geopolymer printing were investigated by open time and rheology of fresh pastes. The results show that Si/Al ratios cause the change of buildability. Higher Si/Al of geopolymer printing materials is beneficial to buildability: longer open time, lower plastic viscosity, higher yield stress, and great thixotropic guaranteed the continuity and stability of structure in the printing system.
10.14359/51711251
SP-330-16
J. Fernando Martirena, Eilys Valdes, Adrian Alujas, and Karen Scrivener
This paper presents the results of the work to develop a mineral addition produced with a blend of 60% of calcined clay of kaolinitic origin, 30% of limestone and 10% of gypsum, to be added as Supplementary Cementitious Material directly while mixing concrete. The clay used has a kaolinite content within 40-50%, and has been activated at 800°C. The three components have been interground at a ball mill. The influence of the addition on cement hydration has been studied aided by Isothermal calorimetry of cement pastes having mineral additions of 35% and 50% per weight. Concrete with the minimum cement content required for the most aggressive exposure class (350 kg/m3) has been cast and mineral additions of 17% and 34% per weight have been made. Concrete strength went above 45 MPa, despite having the minimum cement content.
10.14359/51711250
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