Investigating the Effect of natural Pozzolans on Mechanical Properties of Roller Compacted Concrete
محورهای موضوعی : Structural Engineering
Mohammad Falahnejad
1
(
Master's degree in Structural Engineering at Islamic Azad University, Qazvin Branch, Iran
)
Mahdi Mahdikhani
2
(
Faculty of Civil Engineering, Imam Khomeini International University, Qazvin, Iran.
)
کلید واژه: Roller Compacted concrete, Mechanical Properties, Zero Slump, Road pavement, VeBe test,
چکیده مقاله :
Roller Compacted Concrete (RCC), is a concrete with zero slump, which is used in damming and road pavement. Roller Compacted Concrete Pavement (RCCP) bear heavy traffic loads and severe weather conditions. This type of concrete is due to its economic and environmental capabilities, including reduced construction and maintenance costs, longer durability and longer lifetime, as well as environmental compatibility. This paper presents the results of laboratory studies on the effect of natural pozzolan (zeolite) on the mechanical properties of RCC specimens. In this study, cement materials of were used The rheological performance test (VeBe) and compressive and tensile strengths at the age of 7, 14 and 28 days and the flexural strength tests at 14 and 28 days were performed on the specimens. The results show that the higher amount of pozzolan reduced concrete efficiency (the time of VeBe increased). In addition, the compressive, tensile and flexural strength of the samples are decreased, significantly. However, reducing resistance does not mean compliance with the requirements of the Code.
[1] Guide for the design and implementation of roller concrete in pavement of the country, Journal No. 354.
[2] Haque, M.N., No-Slump Concrete With Fine Sand and Clay, Cement and Concrete Research, 1981, 11, 531-539.
[3] Qasrawi, Hisham Y. Asi, Ibrahim M. Al-Abdul Wahhab, H.I., Proportioning RCCP mixes under hot weather conditions for a specified tensile strength, Cement and Concrete Research, 2005, 35, 267–276.
[4] Ameri, Mahmoud. Shekarchizadeh, Mohammad. Shahabi Shahmiri, Hosein. Investigating the effect of using slag of Esfahan Steel Convertor as a substitute for aggregate on concrete pavement. Eighth International Civil Engineering Congress.1388. Shiraz.
[5] Shekarchizadeh, Mohammad. Fakher, Ali. Eftekhar, Mohammad Hosein. Zare Rami, Keyvan. Determination of the permeability of the concrete and its comparison with other concrete properties. Sixth National Congress on Civil Engineering. 1390. Semnan.
[6] Shekarchizadeh, Mohammad. Eftekhar, Mohammad Hosein. Hozhabri Fooladzadeh, Shirin. Malek Mohammadi Bidhendi, Amir. Investigate the permeability of seams in roller compacted concrete. Fourth National Concrete Conference. 1391. Tehran.
[7] Vahedifard, Farshid. Nili, Mahmoud. Meehan, Christopher L., Assessing the effects of supplementary cementitious materials on the performance of low-cement roller compacted concrete pavement, Construction and Building Materials, 2010, 24, 2528-2535.
[8] Nili ,Mahmoud. M.Zaheri., Deicer salt-scaling resistance of non-air-entrained roller-compacted concrete pavements, Construction and Building Materials,2011,25,1671-1676
[9]M., Madhkhan, R., Azizkhani, M.E., Torki Harchegani., Effects of pozzolans together with steel and polypropylene fibers on mechanical properties of RCC pavements, Construction and Building Materials,2012,26,102-112
[10] Abiri. A, Miri.M, Investigation of the effect of lime on the characteristics of road pavement roller concrete, Second National Conference on Soil Mechanics and foundation Engineering, 1394, Qom.
[11] ACI Committee 207.5R, (2011),“Report on Roller-Compacted Mass Concrete,”American Concrete Institute.
[12] ASTM D 4253, “Standard Test Methods for Maximum Index Density and Unit Weight of Soils Using a Vibratory Table” American Society For Testing and Materials.
[13] ASTM D 254, “Specification for Heavy-Body Coal-Tar or Water-Gas-Tar Protective Coating with Solvent Vehicle, for Cold Application, for Damp-Proofing Masonry Structures” American Society For Testing and Materials.
[14] ASTM C 192, “Standard Practice for Making and Curing Concrete Test Specimens in the Laboratory” American Society For Testing and Materials.
