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 27 Abstracts search results
Document:
SP303-01
Date:
June 1, 2015
Author(s):
Terence C. Holland
Publication:
Symposium Papers
Volume:
303
Abstract:
ACI 318, “Structural Concrete Building Code,” has been completely reorganized for the 2014 edition. While the technical provisions of most of the code have been unchanged, changes have been made in the provisions dealing with responsibility, durability, and construction. The responsibility for use of the code has been assigned to the licensed design professional (LDP.) Minor changes have been made to the durability provisions to clarify the intent of the code and to help the LDP select exposure classes. The most significant changes in ACI 318-2014 are in a new chapter that addresses construction requirements. Previously, construction provisions were located throughout the code. The new code is based upon the premise that the contractor should not have to search the code for construction requirements. Instead, all such requirements must be in the construction documents that are a part of the contract between the owner and the contractor. The new chapter makes the LDP responsible for writing the applicable design information and compliance requirements into the construction documents.
DOI:
10.14359/51688121
SP303-21
Wei Li, Yi Wang, Gao-ming Wang, Yu Shi, and Zi-ming Wang
Currently, despite the large production, only about 10% of the fluorosilicates, a by-product from the phosphate fertilizer factories can be recycled, leading to no economic benefits. Moreover, the only way to dispose of fluorosilicates is discharging it into water, bringing about water pollution. However, fluorosilicate can be used as a basic material to improve the strength and hardness and then enhance durability of concrete according to a certain volume-to-weight fraction. In this paper, the enhanced performance of fluorosilicate on concrete was studied via the setting time of cement, the fluidity and strength of mortar, the mixing performance and the strength of the concrete. The enhanced mechanism was analyzed by XRD and SEM methods.
10.14359/51688141
SP303-04
Aliakbar Ramezanianpour, SeyedAli Ghahari, AmirMohammad Ramezaninapour, and Khashayar Esmaeili
The effect of initial steam curing and different types of mineral additives (Metakolin, Pumis, and Trass) on mechanical and durability characteristics of self-compacting concrete (SCC) was investigated and evaluated by various test methods. Concrete specimens were exposed to six different steam curing regimes after casting, namely two different temperatures (60, and 70 °C), and three total durations (16, 18, 20 hours). Results of surface electrical resistivity, and Rapid chloride penetration test (RCPT) for durability, and compressive strength for mechanical properties showed that exposing specimens to higher temperature could significantly improve compressive strength by promoting hydration.
10.14359/51688124
SP303-02
Yang Fumin, Ma Rongtian, Zhang Yuanqing, and Zhang Yong
Materials for grouting post-tensioning tendons of a bridge at below freezing temperature (–10oC or 14oF) were studied. The water/cementitious material ratio was a maximum of 0.32 and the grout properties were tested at -10oC (14oF) according to applicable Chinese standards for past-tensioning grouts. After special treatment, the efflux times of the modified grouts were between 14 and 22 seconds after mixing and less than 30 seconds after 60 minutes without agitation. The final strength of the grout reached 50-60 MPa (7975-8700 psi) after 35 days of curing (7 days at below freezing temperature and 28 days at a standard temperature), which was 95%-100% of the reference strength for curing at a standard temperature.
10.14359/51688122
SP303-15
Ashok. K. Tiwari, Maulik. M. Panseriya, Prakash C. Mathur, and Subrato Chowdhury
The workability of blended cement-based materials depends strongly on the rheology of the paste, which depends on various properties of its components. In this study the influence of specific surface area and water-binder ratio on the yield stress and viscosity of blended cement pastes were investigated. Both rheological parameters were seen to vary for the evaluated design parameters. These rheological parameters were also compared with two simple tests, mini slump and Marsh cone. It was learned that there is a strong relationship between yield stress and surface area of pastes; however, the surface area did not influence the viscosity of the pastes. It was also seen that the marsh cone was a better test, compared to the mini slump cone test, to understand the rheology of blended cement based pastes.
10.14359/51688135
Results Per Page 5 10 15 20 25 50 100