Ready-to-use admixture reduces concrete cracking and curling
Cracks can weaken concrete, compromise its durability and allow ingress of corrosive elements such as water, chlorides and ice. Concrete applications such as floors, screed and precast panels with large surface-to-volume ratios have a higher risk of cracking.
Concrete cracking and curling is a result of shrinkage, which happens at all stages in the life of concrete, with a length of concrete cast potentially shrinking by as much as 0.08%. While concrete has excellent plasticity when fresh and high mechanical strength once set, it can only withstand minor deformation. When shrinkage comes up against a mechanical constraint, the concrete may crack.
Preventing concrete structures from cracking or curling is a top priority for contractors and manufacturers, to ensure the success of applications and to prevent cracking from spoiling the appearance of the concrete.
As a ready-to-use shrinkage-reducing admixture for concrete and mortars, CHRYSO asserts that its Serenis product can reduce shrinkage by up to 80% depending on the conditions and concrete mix design. This makes it particularly suited for all applications requiring minimal shrinkage, including injection grouting, high and ultra-high performance concrete and special structures.
Evaporation takes place mainly from the surface of concrete, which leads to more shrinkage on the surface and as the concrete shrinks, the edges rise. The severity of this action depends on the surface-to-volume ratio but even the slightest curling is a risk. It can endanger an element’s integrity, leading to breakage during transport, unloading or even under its own weight. Reducing the amount of shrinkage reduces the possibility of curling.
Industrial floors made from concrete are normally divided into areas of 5 m x 5 m, bordered by shrinkage joints sawn into the surface of the concrete. CHRYSO’s Serenis is designed to allow users to increase the distance between shrinkage joints and more distance between shrinkage joints helps save time on laying floors, reduced maintenance costs and improved overall appearance.
The company explains that its admixture works by reducing the capillary tensions, therefore impacting the most important mechanism at the origin of shrinkage. It does not have a spreading effect and does not modify the water demand of concrete nor impact the water-to-cement ratio. It is compatible with new generation superplasticisers as well as traditional plasticisers and superplasticisers.
Comments
Press Office
Announcements
What's On
Subscribe to improve your user experience...
Option 1 (equivalent of R125 a month):
Receive a weekly copy of Creamer Media's Engineering News & Mining Weekly magazine
(print copy for those in South Africa and e-magazine for those outside of South Africa)
Receive daily email newsletters
Access to full search results
Access archive of magazine back copies
Access to Projects in Progress
Access to ONE Research Report of your choice in PDF format
Option 2 (equivalent of R375 a month):
All benefits from Option 1
PLUS
Access to Creamer Media's Research Channel Africa for ALL Research Reports, in PDF format, on various industrial and mining sectors
including Electricity; Water; Energy Transition; Hydrogen; Roads, Rail and Ports; Coal; Gold; Platinum; Battery Metals; etc.
Already a subscriber?
Forgotten your password?
Receive weekly copy of Creamer Media's Engineering News & Mining Weekly magazine (print copy for those in South Africa and e-magazine for those outside of South Africa)
➕
Recieve daily email newsletters
➕
Access to full search results
➕
Access archive of magazine back copies
➕
Access to Projects in Progress
➕
Access to ONE Research Report of your choice in PDF format
RESEARCH CHANNEL AFRICA
R4500 (equivalent of R375 a month)
SUBSCRIBEAll benefits from Option 1
➕
Access to Creamer Media's Research Channel Africa for ALL Research Reports on various industrial and mining sectors, in PDF format, including on:
Electricity
➕
Water
➕
Energy Transition
➕
Hydrogen
➕
Roads, Rail and Ports
➕
Coal
➕
Gold
➕
Platinum
➕
Battery Metals
➕
etc.
Receive all benefits from Option 1 or Option 2 delivered to numerous people at your company
➕
Multiple User names and Passwords for simultaneous log-ins
➕
Intranet integration access to all in your organisation