Research Papers

Evaluation of Mechanical Behavior and Microstructural Characteristics of Photocatalytic Concretes to Be Used as Pavement Blocks

[+] Author and Article Information
João Victor Staub de Melo

Department of Civil Engineering,
Federal University of Santa Catarina,
Street João Pio Duarte da Silva,
Córrego Grande, No. 205,
Florianópolis, SC 88040-970, Brazil
e-mail: joao.victor@ufsc.br

Glicério Trichês

Department of Civil Engineering,
Federal University of Santa Catarina,
Street João Pio Duarte da Silva,
Córrego Grande, No. 205,
Florianópolis, SC 88040-970, Brazil
e-mail: glicerio.triches@ufsc.br

Contributed by the Materials Division of ASME for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received July 17, 2015; final manuscript received March 3, 2016; published online May 13, 2016. Assoc. Editor: Erdogan Madenci.

J. Eng. Mater. Technol 138(3), 031013 (May 13, 2016) (8 pages) Paper No: MATS-15-1164; doi: 10.1115/1.4033275 History: Received July 17, 2015; Revised March 03, 2016

This paper reports the results obtained in a study on the effect of the addition of TiO2 nanoparticles on the mechanical properties and microstructural characteristics of photocatalytic concretes. In the hardened state, tests to determine the compressive strength and modulus of elasticity were carried out. Also, microstructural aspects of the samples were investigated. In the fresh state, the influence of the addition of TiO2 on the concrete compaction and conduction calorimetry curves was evaluated. The results obtained indicated a better mechanical and microstructural behavior of concrete with addition of TiO2.

Copyright © 2016 by ASME
Topics: Concretes
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Fig. 1

Particle shape and size: anatase I (a) and anatase II (b)

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Fig. 2

Shape and particle size (rutile)

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Fig. 3

PZD of aggregate granite

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Fig. 4

Mercury in contact with a porous solid, where θ is the contact angle

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Fig. 6

Curves of compressive strength of concrete with anatase I

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Fig. 7

Curves of compressive strength of concrete with anatase II

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Fig. 8

Curves of compressive strength of concrete with rutile

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Fig. 9

Heat of hydration curves

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Fig. 10

Cumulative heat flow

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Fig. 11

Total porosity in the specimen

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Fig. 12

Distribution of pore diameter

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Fig. 13

Distribution of porosity by bands diameters

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Fig. 14

Microstructure of concrete: (a) reference, (b) anatase I—10%, (c) anatase II—10%, and (d) rutile—10%

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Fig. 15

Homogenization of anatase I (a) and anatase II (b) with Portland cement



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