Construction Engineering and Management Commons^™

Mat-754: Internal Curing Of High Performance Concrete Using Lightweight And Recycled Concrete Aggregates, Mohamed S. Afifi, Mohamed N. Abou-Zeid

Canadian Society for Civil Engineering

Concrete curing is of paramount importance in order for concrete to meet performance requirements. Conventionally, curing has been conducted by means of water sparkling, wet burlap or a curing compound. For performance and environmental reasons, internal curing has been gaining increased attention. However, more data is needed for the effectiveness of this curing technique when used in various concrete mixtures.

This investigation addresses potential utilization of internal curing in high performance concrete (HPC). Internal curing was introduced by means of three aggregates: perlite, pumice and recycled aggregates; all of which were incorporated into HPC mixtures. Conventional mixtures were prepared and …

Mat-755: Sustainable Road Construction For Heavy Traffic Using High Strength Polymeric Geocells, Sanat K. Pokharel, Meisam Norouzi, Ian Martin, Marc Breault

Canadian Society for Civil Engineering

Construction Sustainability has been the focus of debate ever since the Brundtland commission report ‘Our Common Future’ defined Sustainable Development. Kyoto Protocol and subsequent climate change conferences leading up to the Paris submit this year has put still more emphasis on this agenda. Construction of heavy traffic unpaved access roads require huge amount of aggregate mining and long haulage in the areas of scarce virgin aggregate. Conventional practices in these road constructions seek structural adequacy but never specifically address the sustainability issue. Innovative technology that can reduce the volume of aggregate material while maintaining the structural integrity is required to …

Mat-756: Investigation Of The Impact Of Rap Gradation On The Effective Binder Content In Hot Mix Asphalt, Saeed S. Saliani, Alan Carter, Hassan Baaj

Canadian Society for Civil Engineering

Nowadays, it is common to add a little amount of Reclaimed Asphalt Pavement (RAP) in asphalt mixes without changing too much properties such as modulus and low temperature cracking resistance. Not only will those mixes be able to make roads last longer, but they will be a greener alternative to usual mixes. In order to make a flexible pavement design, the mixture behavior is usually characterized with the complex modulus. To have a high modulus mix, you need to control the gradation precisely even when RAP is added. When performing a mix design to incorporate RAP, it is desirable to …

Mat-758: Constructability Benefits Of The Use Of Lightweight Foamed Concrete Fill (Lfcf) In Pavement Applications, Michael L. J. Maher, John B. Hagan

Canadian Society for Civil Engineering

Lightweight Foamed Concrete Fill (LFCF), also known as cellular concrete, has been growing in use in transportation infrastructure projects over recent years. LFCF is a versatile construction material that has now been in use for over 30 years. A number of recent road rehabilitation projects have demonstrated some of the benefits of use. With a greater emphasis on sustainability on all provincial and municipal road projects, new solutions are being sought to minimize the generation of waste and deliver better performing pavements that require less maintenance interventions. Roads over peat and organic deposits pose challenges for road agencies. They are …

Mat-759: Particle Size Analysis As A Means To Better Understand The Influence Of Fly Ash Variability In Concrete, Yasar Abualrous, Daman K. Panesar, R. Doug Hooton, Bhupinder Singh

Canadian Society for Civil Engineering

Fly ash is generated from thermal power stations as an industrial by-product of coal combustion materials. Its particles are generally glassy, spherical in shape, and typically range in size from 0.5-300 µm. Coal fly ash is widely used as a partial cementitious material in concrete, which not only offers economic and environmental benefits but also improves concrete performance. However, variability of the physical description and chemical composition of fly ash has been considered to be a major barrier to its increased use in cement and concrete. In this study the variability and properties of fly ash are characterized with an …

Mat-760: Comparison Of Laboratory Performance Tests Used To Assess Alkali-Silica Reactivity, Farideh Golmakani, R. Douglas Hooton

Canadian Society for Civil Engineering

Alkali-silica reaction of certain concrete aggregates can lead to premature deterioration and maintenance problems in concrete structures. The CSA A23.1-14A/ASTM C1293 concrete prism test (CPT) and the CSA A23.2-25A/ASTM C1260/ASTM C1567 accelerated mortar bar test (AMBT) are the two main procedures used in CSA and ASTM standards for examining the potential alkali-silica reactivity (ASR) of aggregates and also for assessing the effectiveness of supplementary cementing materials (SCMs) in suppressing ASR. The long testing duration of the CPT and the unreliability of the rapid AMBT have led to development and evaluation of a third method, the accelerated concrete prism test (ACPT). …

Mat-761: The Effect Of Temperature On The Lateral Response Of Unbonded Fiber-Reinforced Elastomeric Isolators, Alexander N. Sciascetti, Yasser M. Al-Anany, Michael J. Tait

Canadian Society for Civil Engineering

Base isolation is a method that can be employed to significantly reduce the demands on a structure during a seismic event. This method has shown considerable success in reducing the adverse effects of earthquakes, including damage and loss of life. The main concept of base isolation is to reduce the seismic demand on a structure by placing isolators beneath the superstructure at points where load is transferred to the foundation. One of the most commonly used types of isolator is the elastomeric isolator. These isolators are traditionally comprised of layers of elastomer and steel. More recently, research has been completed …

Mat-763: Assessment Of Ultra-High Performance Fibre Reinforced Concrete- Normal Strength Concrete Or High Strength Concrete Composite Members In Chloride Environment, Luaay Hussein, Lamya Amleh

Canadian Society for Civil Engineering

The purpose of this study was to investigate the performance of composite members of ultra-high performance fibre-reinforced concrete (UHPFRC) and normal strength or high strength concrete (NSC/HSC) in chloride environments. Experimental studies were carried out on UHPFRC-NSC/HSC prisms in order to investigate the effect of dry and wet cycles on the flexural capacity of those composite members. Each prism specimen was designed with the UHPFRC layer in tension and the NSC/HSC layer in compression. Three fibre volume contents (1%, 1.5%, and 2%) were investigated. The test results revealed that the degradation in the flexural capacity of UHPFRC-NSC/HSC specimens after exposure …