Mechanical Properties of Concrete Produced by Light Cement-Based Aggregates

Ibrahim, Mais Abdulrazzaq; Atmaca, Nihat; Abdullah, Ahmed Assim; Atmaca, Adem

doi:10.3390/su142315991

Cited by 6 publications

(3 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The annual production of groundgranulated blast-furnace slag (GGBFS) as a solid waste material from the iron melting process is very high. Reusing trash to make new building supplies or synthetic exaggerate (like fly ash, a byproduct of thermal power plants) is supported by research, [1,2] sewage sludge, [3,4] quartz powder, [5] and different types of ashes [6] which were studied.…”

Section: Introductionmentioning

confidence: 99%

Physical and Mechanical Properties of an Artificial Aggregate Made up of Ground Granulated Blast-Furnace Slag

Ibrahim,

Atmaca,

Atmaca

2023

Cihan U Erbil SCI J

View full text Add to dashboard Cite

Manufacturing artificial aggregate by utilizing waste materials has gained great importance as the aggregate occupies a high volume in concrete (60–70%). In this paper, ground granulated blast furnace slag (GGBFS) is utilized in aggregate manufacturing. Cold bonding and sintering methods were used as production processes. The pellets were put through a series of tests like dry density, specific gravity, water absorption, and crushing strength. The results indicated that the density of pellets increased by increasing the GGBFS dosage while the water absorption capacity was reduced. Furthermore, the highest crushed strength was recorded at 50% addition of GGBFS.

show abstract

Section: Introductionmentioning

confidence: 99%

Physical and Mechanical Properties of an Artificial Aggregate Made up of Ground Granulated Blast-Furnace Slag

Ibrahim,

Atmaca,

Atmaca

2023

Cihan U Erbil SCI J

View full text Add to dashboard Cite

show abstract

“…Manufactured lightweight aggregates increase the cost of concrete production and, in some cases, create environmental overburden [ 7 ]. The mechanical properties of concrete formed with lightweight aggregates are affected by the type and water content of the aggregates [ 8 ]. The main disadvantages of lightweight aggregates in concrete are their high cost, poor mechanical properties, and general durability concerns.…”

Section: Introductionmentioning

confidence: 99%

Lightweight SCC Development in a Low-Carbon Cementitious System for Structural Applications

et al. 2023

View full text Add to dashboard Cite

The utilization of manufactured lightweight aggregates adds another dimension to the cost of the preparation of self-compacting concrete (SCC). The common practice of adding absorption water to the lightweight aggregates before concreting leads to inaccurate calculations of the water-to-cement ratio. Moreover, the absorption of water weakens this interfacial bond between aggregates and the cementitious matrix. A particular type of black volcanic rock with a vesicular texture known as scoria rocks (SR) is utilized. With an adapted sequence of additions, the occurrence of water absorption can be minimized to overcome the issue of calculating the true water content. In this study, the approach of preparing the cementitious paste first with adjusted rheology followed by the addition of fine and coarse SR aggregates enabled us to circumvent the need for adding absorption water to the aggregates. This step has improved the overall strength due to the enhanced bond between the aggregate and the cementitious matrix, rendering a lightweight SCC mix with a target compressive strength of 40 MPa at 28 days, which makes it appropriate for structural applications. Different mixes were prepared and optimized for the best cementitious system that achieved the goal of this study. The optimized quaternary cementitious system included silica fume, class F fly ash, and limestone dust as essential ingredients for low-carbon footprint concrete. The rheological properties and parameters of the optimized mix were tested, evaluated, and compared to a control mix prepared using normal-weight aggregates. The results showed that the optimized quaternary mix satisfied both fresh and hardened properties. Slump flow, T50, J-ring flow, and average V-funnel flow time were in the ranges of 790–800 mm, 3.78–5.67 s, 750–780 mm, and 9.17 s, respectively. Moreover, the equilibrium density was in the range of 1770–1800 kg/m3. After 28 days an average compressive strength of 42.7 MPa, a corresponding flexural load of over 2000 N, and a modulus of rupture of 6.2 MPa were obtained. The conclusion is then drawn that altering the sequence of mixing ingredients becomes a mandatory process with scoria aggregates to obtain high-quality lightweight concrete for structural applications. This process leads to a significant improvement in the precise control of the fresh and hardened properties, which was unachievable with the normal practice used with lightweight concrete.

show abstract

“…Despite these advantages, CFAA concrete generally has a lower strength, owing to aggregate crushing and matrix cracking [23]. Ibrahim et al [24] found CFAA concrete had weaker bond strength compared to ordinary concrete through reinforcement steel bar pull-out tests. Some studies focused on strengthening aggregates to improve concrete performance [25,26].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nanosilica on the Strength and Durability of Cold-Bonded Fly Ash Aggregate Concrete

Peng,

Wang,

2023

Sustainability

View full text Add to dashboard Cite

Cold-bonded Fly Ash Aggregate (CFAA), as an alternative to natural coarse aggregates, can prepare more lightweight, economical, and sustainable concrete. However, CFAA concrete has insufficient durability, which hinders its application in a salt-corrosion environment. Nanosilica (NS) has an advantage of high activity and is generally used as an efficient mineral admixture in engineering. This study aims to improve the strength and durability of CFAA concrete by incorporating NS. To this end, compression tests, splitting tensile tests, and microscopic analyses were performed to investigate the mechanical properties of the concrete containing different NS dosages. Subsequently, the dry–wet and freeze–thaw durability tests were conducted to evaluate the salt-corrosion resistance and the frost resistance in the water, Na2SO4 solution, and Na2CO3 solution. The results show the compressive and splitting tensile strength peak at 2 wt% NS dosage. In this instance, the concrete has an optimum microstructure and exhibits desirable salt-corrosion resistance in the late stage of dry–wet cycles. During freeze–thaw cycles, NS could improve the frost resistance of the concrete but scarcely diminished internal damage under sulfate attack. The study explores the long-term performance of NS-modified CFAA concrete, providing a simple and effective method to mitigate the concrete deterioration in a harsh environment.

show abstract

Mechanical Properties of Concrete Produced by Light Cement-Based Aggregates

Cited by 6 publications

References 48 publications

Physical and Mechanical Properties of an Artificial Aggregate Made up of Ground Granulated Blast-Furnace Slag

Physical and Mechanical Properties of an Artificial Aggregate Made up of Ground Granulated Blast-Furnace Slag

Lightweight SCC Development in a Low-Carbon Cementitious System for Structural Applications

Effect of Nanosilica on the Strength and Durability of Cold-Bonded Fly Ash Aggregate Concrete

Contact Info

Product

Resources

About