Current Issue Flipbook

Trade Journals for the Concrete Industry

Current Issue Archive Online Flipbooks CPI Middle East CPI TV Events Buyers' Guide Newsletter Advertising Subscription

Variable Density Precast ConcretePanel Development

Innovative precast technology from New Zealand


The development of a variable density precast concrete panel system is described that significantly improves the thermal efficiency of concrete buildings by simultaneously improving insulation and increasing thermal mass. Concrete from a single mix is stratified (defined as controlled segregation under vibration) to produce a lightweight, top layer and a dense, bottom layer. When erected, the panels have the lightweight layer on the outside providing insulation while the inner layer provides structural strength and improves thermal mass. Concrete mixes were stratified using different density aggregates, ensuring the rheology was in the correct range and using moderate levels of vibration. Waste materials such as fly ash, slag and expanded glass were used together with either Portland cement (PC) or inorganic polymer (IP) binders. Initial findings suggest that there is significant potential in using variable density concrete in buildings to improve thermal efficiency and comfort.

Show article
Download article


CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 10 different language editions in more than 170 countries. These trade journals, with their practical editorial reporting on research, production and applications, are specifically addressing the decision makers of the concrete and precast concrete industry.

About us
ad-media GmbH

Industriestrasse 180
50999 Cologne

T: + 49 2236 96 23 90
F: + 49 2236 96 23 96

  • Magazine
  • CPi-tv
  • Events
  • Buyers' Guide
  • Newsletter
  • Advertising
  • Patents
  • ad-media GmbH
  • Linkedin
  • Imprint
  • Data Protection
We are using Cookies on www.cpi-worldwide.com. Some of them are essential, while others help us improve this website and your experience. More information can be found in our privacy policy. Accept all Extended Configuration
Cookies of this category are required for the basic functions of the website. They are used for safe and proper use and therefore cannot be deactivated.
Cookies of this category allow us to analyze (Google Analytics) the use of the website and measure performance. They also help us to provide useful functions.
Cookies of this category allow us to show third-party content (social networks, videos)
Save settings and close Accept all