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
Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
Staff Directory
ACI World Headquarters 38800 Country Club Dr. Farmington Hills, MI 48331-3439 USA Phone: 1.248.848.3800 Fax: 1.248.848.3701
ACI Middle East Regional Office Second Floor, Office #207 The Offices 2 Building, One Central Dubai World Trade Center Complex Dubai, UAE Phone: +971.4.516.3208 & 3209
ACI Resource Center Southern California Midwest Mid Atlantic
Feedback via Email Phone: 1.248.848.3800
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-330-16
September 26, 2018
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
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-330-08
Ivan Janotka, Pavel Martauz, and Michal Bacuvcik
Hybrid cement (H-CEMENT) is an innovative cement of the producer from Slovakia. H-CEMENT is suitable for the production of ready-mixed concrete of compressive strength classes up to C 30/37 (4350/5370 psi) along with shrinkage-reducing and alkali-aggregate reaction-mitigating properties. The results of 5-years of exposure of H-CEMENT mortar in an aggressive sulfate solution are compared with two reference cement mortars made either with CEM I or sulfate-resistant CEM I SR 0. Sulfate resistance of H-CEMENT was evaluated in the regularly-renewed aggressive 5% solution by none-destructive tests (dynamic modulus of elasticity and length changes), destructive tests (flexural and compressive strength), microstructure studies (XRD, TG-DTA and SEM), wet chemical analyses (mainly the estimation of SO3 content), and pore structure technique (MIP). The results give evidence of the same high sulfate resistance for H-CEMENT as that for CEM I SR 0 with C3A = 0.
10.14359/51711242
SP-330-12
Ricardo Remus, Christiane Roessler, and Horst‑Michael Ludwig
Power Ultrasound (PUS) is widely used in various technical processes (from pharmaceutic to ceramic and fuel industry) to disperse suspensions and to control crystallization processes. Previous investigations by the authors have shown that a short PUS treatment during mixing process effectively accelerates the growth of strength determining C-S-H phases and thus hydration and setting of Portland cement pastes. The present study concerns the workability, the strength development and the durability of sonicated concretes. Results of study shows, that flowability is increased after sonication and stiffening of cement paste can be fully compensated. The strength development is significantly accelerated and durability testing on sonicated concretes reveals that negative effects of PUS on carbonation behaviour, freezing/thawing- and sulphate-resistance can be excluded. The advantage of using PUS to accelerate early-strength development of concrete is that little or no chemical accelerators or heat treatment are required. Enhancement of cement reactivity by PUS application during mixing possibly paves the way for application of cements with low CO2-footprint for precast concrete production.
Power Ultrasound (PUS) is widely used in various technical processes (from pharmaceutic to ceramic and fuel industry) to disperse suspensions and to control crystallization processes. Previous investigations by the authors have shown that a short PUS treatment during mixing process effectively accelerates the growth of strength determining C-S-H phases and thus hydration and setting of Portland cement pastes.
The present study concerns the workability, the strength development and the durability of sonicated concretes. Results of study shows, that flowability is increased after sonication and stiffening of cement paste can be fully compensated. The strength development is significantly accelerated and durability testing on sonicated concretes reveals that negative effects of PUS on carbonation behaviour, freezing/thawing- and sulphate-resistance can be excluded. The advantage of using PUS to accelerate early-strength development of concrete is that little or no chemical accelerators or heat treatment are required. Enhancement of cement reactivity by PUS application during mixing possibly paves the way for application of cements with low CO2-footprint for precast concrete production.
10.14359/51711246
Results Per Page 5 10 15 20 25 50 100