Restrained Early Age Shrinkage at the Vertical Interface Between Freshcementitious Mixtures And Hardened Substratespart-II
Journal Title: International Journal of engineering Research and Applications - Year 2018, Vol 8, Issue 5
Abstract
Casting fresh cementitious materials against a hardened concrete substrate is common for most concrete constructionin repair and retrofitting, leading to cold-joints or construction joints. The potential for problems to arise may be exacerbated when high performance concretes with a lower water-to-cementitious ratio (w/c) is used particularly when restrained early age shrinkage and subsequent drying shrinkage occurs. Such shrinkage may result in micro-racking especially at an interface that is vertically formed between the two cementitious materials, leading to durability issues and premature loss of serviceability. This experimental study in Part II has examined the size effect of early age shrinkage under โsealedโ condition in larger size specimens.The results show that the duration during whichdevelopment of early age shrinkage is accompanied by moisture loss through the interfacescan be expected to continuefor a longer duration typically, beyond 24 hours after adding water to the mix. The strategy to minimizing micro-cracks through reducingheat evolution and moisture loss through the interface simultaneously was found to be particularly effective in large sized specimen.
Authors and Affiliations
K. Kawaai, K. C. G. Ong
Keywords
Related Articles
- EP ID EP394194
- DOI 10.9790/9622-0805024246.
- Views 76
- Downloads 0
Pyramidal Sum Labeling In Graphs
Let G = (V, E) be a graph with p vertices and q edges. A graph G is said to admit Pyramidal Sum labeling if its vertices can be labeled by nonnegative integers 0,1,2 โฆ ๐๐ such that the induced edge labels obtained by the...
Prediction of Collapsible Behavior of Red Soils
Red soils make the construction of foundations extremely difficult in its natural state. It may cause high differential movements in structures through collapse settlement on saturation. This phenomenon is primarily rela...
A Review- Remote Sensing
Now-a-days the field of Remote Sensing and GIS has become exciting and glamorous with rapidly expanding opportunities. Many organizations spend large amounts of money on these fields. Here the question arises why these f...
A Comparative Study of Optical Character Recognition for Printed and Handwritten Tamil Text
This paper compares the methodologies for recognizing printed Tamil text document with handwritten Tamil text. Each of the preprocessing phases uses various techniques. But both the techniques are used to extract the fea...
Performance Analysis of Spatially Multiplexed MIMO using STBC Antenna Diversity Technique
A new wireless broadband technology, MIMO (multiple input multiple output) systems, has gained great popularity for faster data transmission speed and have been actively investigated and successfully deployed for the eme...