Development of a Concrete Maturity Protocol
Title | Development of a Concrete Maturity Protocol PDF eBook |
Author | W. James Wilde |
Publisher | |
Pages | 94 |
Release | 2013 |
Genre | Concrete |
ISBN |
An extensive field and laboratory project was undertaken to evaluate the applicability of the concrete maturity method to predict opening to traffic criteria for portland cement concrete paving operations in Minnesota. The field study included visits to18 paving projects in the state over a three-year period. At these projects, different sensor types were evaluated. In the laboratory study, two-inch mortar cubes were tested to develop sensitivity analyses related to the proportions of cementitious materials, water-cementitious materials ratio, and other mix components. The study also evaluated different mathematical models and their ability to predict concrete strength relative to the computed maturity. In addition, a database of concrete mixes and their associated maturity curves were developed, as well as a spreadsheet for viewing maturity curves and entering new information into the database. A draft laboratory manual and a construction specification for creating and using maturity curves were developed. The results of this project include recommendations for maturity equipment, the method and ages for testing flexural beams when developing and validating maturity curves, the use of the exponential model for maturity curves, and suggestions for a construction specification and a laboratory manual. Further data collection and evaluation should be conducted by MnDOT as the method is implemented into standard practice. Appropriate modifications should then be made to ensure the method's ability to predict traffic opening and to enhance the effectiveness of paving operations.
Development of Maturity Protocol for Construction of NJDOT Concrete Structures
Title | Development of Maturity Protocol for Construction of NJDOT Concrete Structures PDF eBook |
Author | Farhad Ansari |
Publisher | |
Pages | 40 |
Release | 1999 |
Genre | Concrete |
ISBN |
In this study, the concrete maturity method (ASTM 1074) was evaluated as a technique to estimate in-place strength in a footing, column, and pier cap on Route 21 in Newark, New Jersey. The results of the testing "painted" a three dimensional picture of strength development in the structure and provided insights to thermal differentials or gradients that cause stresses in early age concrete
Demonstration of Concrete Maturity Test Process on the TH-694/ TH-35E Interchange
Title | Demonstration of Concrete Maturity Test Process on the TH-694/ TH-35E Interchange PDF eBook |
Author | Ryan J. Rohne |
Publisher | |
Pages | 56 |
Release | 2009 |
Genre | Concrete |
ISBN |
A maturity protocol will allow a more precise identification of the time when sufficient strength has been gained such that a pavement can be opened to traffic. This way traffic can be regulated to protect the integrity of the pavement while simultaneously streamlining construction operations by avoiding excessive initial cure periods. The overall goal of this research initiative is to develop maturity strength curves for the majority of the paving mixes used by Mn/DOT and test maturity meter implementation on several projects to observe potential difficulties/successes with their use. As such, Mn/DOT SP 6280-304, the TH-694/TH-35E interchange known as "Unweave the Weave" is one of the first Mn/DOT projects to test the implementation of maturity meters in a field setting. Based on the data from the pilot project and preliminary tasks, maturity curves are sensitive to small changes of 10 lb/yd 3 of cementitious material. It was also found that a maturity datum temperature of 0 °C was too high. Strength continued to increase even when the concrete fell below this temperature. Further studies of 15 projects over the next three years will further increase Mn/DOT's knowledge and experience with the maturity method. Included is an overview of the maturity function utilized by the data loggers.
Concrete Maturity
Title | Concrete Maturity PDF eBook |
Author | Matthew L. LaCome |
Publisher | |
Pages | 180 |
Release | 2000 |
Genre | Concrete |
ISBN |
Maturity Testing for Concrete Pavement Applications
Title | Maturity Testing for Concrete Pavement Applications PDF eBook |
Author | United States. Federal Highway Administration |
Publisher | |
Pages | 6 |
Release | 2005 |
Genre | Concrete |
ISBN |
This technical brief describes the maturity method for predicting the development of concrete strength at early ages. It includes a summary of basic concepts of concrete maturity, a description of expected benefits and equipment requirements, and guidelines on using maturity testing as part of a concrete pavement construction project.
Handbook on Nondestructive Testing of Concrete
Title | Handbook on Nondestructive Testing of Concrete PDF eBook |
Author | V. M. Malhotra |
Publisher | CRC Press |
Pages | 389 |
Release | 2004 |
Genre | Technology & Engineering |
ISBN | 0803120990 |
Civil engineers will value this resource that examines the tools and techniques used to estimate the in-place strength on concrete, permeation properties that relate to potential durability, and the methods used to assess the internal condition of concrete and the corrosion activity of steel reinforcement.
Application of Concrete Maturity in Evaluation of Rapid Hardening Portland Cement Concrete
Title | Application of Concrete Maturity in Evaluation of Rapid Hardening Portland Cement Concrete PDF eBook |
Author | Prasada Rao Rangaraju |
Publisher | |
Pages | 156 |
Release | 2008 |
Genre | Concrete |
ISBN |