TITLE

Effect of coarse aggregate size on strength and workability of concrete

AUTHOR(S)
Tumidajski, Peter J.; Gong, B.
PUB. DATE
February 2006
SOURCE
Canadian Journal of Civil Engineering;Feb2006, Vol. 33 Issue 2, p206
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The properties of concrete were studied when the proportions of 37.5 and 19.5 mm stone in the coarse aggregate were varied. With the cement content of 160 kg/m3 and the ratio of water/cement (w/c) greater than 0.9, the compressive strength is maximum at 25 percent by weight (w/o) of 37.5 mm stone. Conversely, for the cement content of 350 kg/m3 and w/c ratios of less than 0.50, maximum compressive strength is substantively reduced. For both 160 kg/m3 and 350 kg/m3 cement contents, workability improves slightly as the proportion of the 37.5 mm stone is increased. For 100 mm fixed slumps and cement content of less than 160 kg/m3, there was little change in compressive strength as the proportion of 37.5 mm stone increased. However, when cement content was increased from 190 to 350 kg/m3, maximum compressive strength was observed, which shifted downward from 50 w/o to 25 w/o of 37.5 mm stone. In general, to maintain a 100 mm slump, water demand decreased as the proportion of 37.5 mm stone in the coarse aggregate fraction increased.
ACCESSION #
22308720

 

Related Articles

  • Measuring Water in Concrete. Gibbons, Jack // Concrete Construction;Jan2008, Vol. 53 Issue 1, p47 

    The article discusses three ways to specify water amounts for concrete mixes. These include slump tests, calculation of the water-cement ratio and the total amount of water required for a concrete mix. The author also discusses how each method is useful in terms of understanding the impact that...

  • the joy of CONCRETE. Henkenius, Merle // Popular Mechanics;Jun2006, Vol. 183 Issue 6, p70 

    The article presents information on construction using concrete. Concrete is an age-old pillar of civilization, on a par with beer, steel and the T-bone steak. Nearly 2000 years ago, the Romans constructed a temple of a size and design that engineers still look upon with awe. It is called the...

  • On the adaptive sensitivity of subsystem models of cement stone. Chernyavs'kyi, V. L.; Hurkalenko, V. A. // Materials Science;Jul2004, Vol. 40 Issue 4, p539 

    We propose a procedure of synthesis of the hierarchy of subsystem models of a “ cement-stone-corrosive-environment” system. The procedure includes the solution of the problems of identification of the process of adaptation of concrete, situation-time evaluation of its adaptive...

  • Maturity Approach Applied to Concrete by Means of Vicat Tests. García, Álvaro; Castro-Fresno, Daniel; Polanco, Juan Antonio // ACI Materials Journal;Sep/Oct2008, Vol. 105 Issue 5, p445 

    The article reports on a study regarding the evaluation of temperature influence on setting times of concrete. It uses the Freiesleben-Hansen and the Pedersen maturity function for determining the time-setting of concrete. It makes Vicat tests at different temperatures to investigate the...

  • New Strength Model Based on Water-Cement Ratio and Capillary Porosity. Arioglu, Nihal; Girgin, Canan; Arioglu, Ergin // ACI Materials Journal;May/Jun2004, Vol. 101 Issue 3, p250 

    Comments on the study "New Strength Model Based on Water-Cement Ratio and Capillary Porosity," by K.S. Pann and colleagues. Appreciation for the insight into the relationship between the concrete's compressive strength and its physical structure; Recognition of the water-cement ratio attribute...

  • Uniaxial Compressive Strength of Polypropylene Fibre Reinforced Sandcrete Cubes. Ezeokonkwo, J. C.; Nwoji, C. U. // Journal of Emerging Trends in Engineering & Applied Sciences;Dec2011, Vol. 2 Issue 6, p1020 

    Sandcrete block in spite of its low compressive strength and its deficiencies in other properties such as tensile strength, permeability and impact resistance is still a dominant construction material in Nigeria. One of the materials used to improve the properties of concrete is fibres....

  • Automated Determination of Entrained Air-Void Parameters in Hardened Concrete. Zhijuh Zhang; Ansari, Farhad; Vitillo, Nicholas // ACI Materials Journal;Jan/Feb2005, Vol. 102 Issue 1, p42 

    Studies automated determination of entrained air-void parameters in hardened concrete. Image analysis system for acquisition of surface images through a microscope; Pigmenting of the sections to create color contrast between the voids and the concrete matrix.

  • Bricks and tiles hold their prices as aggregates rise.  // Contract Journal;1/29/2003, Vol. 417 Issue 6411, p10 

    Talks about the prices of aggregates, cement and concrete. Price of coated roadstone from May to August 2002; Information on the price of copper pipes.

  • LA RESISTENCIA A COMPRESIÓN DEL HORMIGÓN, CONDICIÓN NECESARIA PERO NO SUFICIENTE PARA EL LOGRO DE LA DURABILIDAD DE LAS OBRAS. Corral, José Toirac // Ciencia y Sociedad;2009, Vol. 34 Issue 4, p463 

    The fulfillment of the resistance to compression as fundamental property of the concrete, hardened during the process of execution of a work, constitutes a great satisfaction for all the actors of the constructive process; but, nevertheless, this does not guarantee its durability in time. In...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics