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Katrina and climate change should we design for strength or durability?

Title: Katrina and climate change should we design for strength or durability?
Author(s): R.N. Swamy
Paper category : conference
Book title: The 50-year Teaching and Research Anniversary of Prof. Sun Wei on Advances in Civil Engineering Materials
Editor(s): C. Miao, G. Ye and H. Chen
Print-ISBN: 978-2-35158-098-1
e-ISBN: 978-2-35158-099-8
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 121 - 128
Total Pages: 8
Nb references: 16
Language: English

Abstract: The overall aim of this paper is to show that if sustainability in concrete construction is to be achieved, then the first step to take is to design concrete materials and concrete structures to have a durable service life with adequate ductility to preserve structural integrity. The paper advocates an integrated material and structural design strategy - a Holistic Approach - based on the principle Strength through Durability rather than Durability through Strength. Such a holistic design strategy will have three key elements. The material strategy will involve the development of a concrete matrix of high impermeability by taking advantage of the synergistic interactions of the cementitious system. However, development of strength and a highly refined pore structure are time-dependent phenomena, and in aggressive and extreme environments, it may well also be necessary to protect the concrete from its surroundings, and further ensure the electrochemical stability of the steel reinforcement. The combination of a high-durability cement matrix, a protective system for the concrete and a corrosion-resistant steel can ensure durable and ductile service life even in the most aggressive and unfriendly exposure, load and climatic conditions. We live in a rapidly changing world where sustainable development of the concrete industry is no longer an option. The most pressing and urgent need worldwide now is the regeneration and rehabilitation of our infrastructure such as affordable housing, water, energy and sanitation systems. Low energy cement production technologies should enable us to develop and produce a wide-range of cost-effective, environmentally friendly and low energy building materials that will save energy, conserve resources and reduce environmental pollution.

Online publication: 2010-04-22
Publication type : full_text
Public price (Euros): 0.00

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