Document Archives

Flexural Fatigue Strength of Structural Lightweight Concrete Under Water (SP144-13)

• ID:

  913

• ESCSI:

  4324.014

• Author:

  Ramakrishnan, V.; G.C. Hoff; Y.U. Shankar

• Publication Name:

  Concrete Technology, Past, Present and Future

• Type of Publication:

  Paper

• Publisher:

  American Concrete Institute

• Dated:

  1994

• Issue/Volume:

• Other ID:

• Page(s):

  251-267

• Reference List:

  Y

• Abstract:

  This paper presents the results of an experimental investigation conducted to determine the flexural fatigue strength of high strength lightweight concrete under water. This concrete was produced using expanded shale aggregate and high performance concrete admixtures silica fume and superplasticizer. Properties of fresh concrete and elastic and mechanical properties of hardened concretes are presented.The fresh concrete was tested for slump, air content, unit weight and temperature. The hardened concrete was tested for moist cured dry unit weight, compressive strength, modulus of elasticity and flexural fatigue strength.
  This investigation shows that a highly workable high-strength lightweight concrete can be produced successfully. The high strength lightweight concrete had a higher (10% to 16%) endurance limit than that of normal-weight concrete of equal compressive strength. In general there was no reduction in the flexural fatigue strength for the lightweight concretes when they were tested under water. The static flexural strength determined from specimens that had successfully resisted two million cycles was always greater than that of specimens which had not undergone fatigue loading.