Results 231 to 240 of about 637,470 (280)
Some of the next articles are maybe not open access.
Magazine of Concrete Research, 2022
Plastic shrinkage cracking propagating at early ages inevitably impairs the performance of concrete structures. To mitigate this, using a recently developed shrinkage-reducing polycarboxylate superplasticiser (SR-PCA) with outstanding shrinkage-reducing and water-reducing effectiveness can be a promising approach.
Jian Zhang +7 more
openaire +1 more source
Plastic shrinkage cracking propagating at early ages inevitably impairs the performance of concrete structures. To mitigate this, using a recently developed shrinkage-reducing polycarboxylate superplasticiser (SR-PCA) with outstanding shrinkage-reducing and water-reducing effectiveness can be a promising approach.
Jian Zhang +7 more
openaire +1 more source
Effect of superplasticizers on the plastic shrinkage of concrete
Magazine of Concrete Research, 1992This Paper presents the results of a study on the effect of five different superplasticizers on plastic shrinkage of concrete. Test specimens of fresh concrete were subjected to a simulated hot dry environmental condition of 35°C, 50% RH and a wind velocity of 3·5mls immediately after casting.
J. G. Cabrera +2 more
openaire +1 more source
Magazine of Concrete Research, 1994
The proposed model of plastic shrinkage is based on the idea that the capillary pressure in a saturated mixture, exposed to drying, depends on the geometry of the spaces between the solid particles near the surface of evaporation and the difference between the amount of evaporated water and the amount of water transferred from inside the mixture to ...
openaire +1 more source
The proposed model of plastic shrinkage is based on the idea that the capillary pressure in a saturated mixture, exposed to drying, depends on the geometry of the spaces between the solid particles near the surface of evaporation and the difference between the amount of evaporated water and the amount of water transferred from inside the mixture to ...
openaire +1 more source
ACI Journal Proceedings, 1968
PLASTIC SHRINKAGE CRACKING OF MORTARS EXPOSED TO DIFFERENT CONDITIONS, AS PREVALENT IN HOT-DRY CLIMATES, WAS INVESTIGATED UNDER CONTROLLED CONDITIONS. THE VARIABLES STUDIED WERE AIR TEMPERATURE AND HUMIDITY, WIND VELOCITY, MORTAR TEMPERATURE, TYPE AND CONTENT OF CEMENT, AND CONSISTENCY.
openaire +1 more source
PLASTIC SHRINKAGE CRACKING OF MORTARS EXPOSED TO DIFFERENT CONDITIONS, AS PREVALENT IN HOT-DRY CLIMATES, WAS INVESTIGATED UNDER CONTROLLED CONDITIONS. THE VARIABLES STUDIED WERE AIR TEMPERATURE AND HUMIDITY, WIND VELOCITY, MORTAR TEMPERATURE, TYPE AND CONTENT OF CEMENT, AND CONSISTENCY.
openaire +1 more source
Influence of Crumb Rubber on the Drying Shrinkage and Plastic Shrinkage Cracking of AASM
Materials Science Forum, 2013The alkali-activated slag mortar (AASM) has disadvantages of high shrinkage and therefore low crack resistance. In this paper, water quenched raw slag was used to replace sand for making AASM, and effects of crumb rubber on the drying shrinkage and plastic shrinkage cracking of AASM were investigated.
Tao Li, Ya Mei Zhang, Zheng Gui Zhu
openaire +1 more source
The Effectiveness of Shrinkage Reducing Admixture and Fly Ash on Plastic Shrinkage of Concrete
2020Concrete members are normally subjected to service load stresses and deformations. Even in the plastic stage, which is very short, the concrete shrinks and induces cracking. To mitigate the impact of shrinkage in concrete, Shrinkage Reducing Admixtures (SRA) and supplementary cementitious materials can be used in concrete.
Jerison Scariah James, Elson John
openaire +1 more source
Study on the Effectiveness of Shrinkage Reducing Admixtures on Plastic Shrinkage of Concrete
2019Concrete is plastic for a very short time from being cast to final setting time. But even in this early age, the concrete shrinks and induces cracking. Aiming to mitigate the impact of shrinkage in concrete, shrinkage reducing admixtures can be used in concrete.
E. K. Arya +2 more
openaire +1 more source
Cement and Concrete Research, 2009
Fresh concrete exposed to high evaporation rates is prone to plastic shrinkage cracking, especially in structures with large surface area/volume ratios. The present work shows that the reduction of the surface tension of the mixing water is an effective way for decreasing such cracking.
José Mora-Ruacho +2 more
openaire +1 more source
Fresh concrete exposed to high evaporation rates is prone to plastic shrinkage cracking, especially in structures with large surface area/volume ratios. The present work shows that the reduction of the surface tension of the mixing water is an effective way for decreasing such cracking.
José Mora-Ruacho +2 more
openaire +1 more source
Influence of Shrinkage-Reducing Admixtures on Development of Plastic Shrinkage Cracks
ACI Materials Journal, 2007Cracking that forms between concrete placement and concrete setting is generally described as plastic shrinkage cracking. The authors discuss how concave menisci may form on fresh concrete surfaces due to water evaporation. Potential development of plastic shrinkage cracks may occur when concrete surface tensile stress and concrete settlement develop ...
openaire +1 more source
CONCREEP 10, 2015
In recent years there has been a rapid increase in the use of supplementary cementitious materials, such as fly ash and ground granulated blastfurnace slag, for high performance and durable concrete, as well as to reduce clinker requirement. Such materials being fine and not as reactive as cement, increase the setting time and water demand, and reduce ...
Moghul Sirajuddin, Ravindra Gettu
openaire +1 more source
In recent years there has been a rapid increase in the use of supplementary cementitious materials, such as fly ash and ground granulated blastfurnace slag, for high performance and durable concrete, as well as to reduce clinker requirement. Such materials being fine and not as reactive as cement, increase the setting time and water demand, and reduce ...
Moghul Sirajuddin, Ravindra Gettu
openaire +1 more source