Influence of water to binder ratio on mechanical properties of blended cements with brick powder waste

2019 ◽  
Author(s):  
Deák György ◽  
Ana Maria Panait ◽  
Andreea Mihaela Moncea ◽  
Diana Florina Dumitru ◽  
Madalina Boboc ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Blended Cements ◽  
Brick Powder ◽  
Influence Of Water ◽  
Binder Ratio ◽  
Water To Binder Ratio

scholarly journals Bond Strength between Glass Fiber Fabrics and Low Water-to-Binder Ratio Mortar: Experimental Characterization

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Daniel Bohling ◽  
Andrzej Cwirzen ◽  
Karin Habermehl-Cwirzen
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Bond Strength ◽  
Glass Fiber ◽  
Penetration Depth ◽  
Pullout Strength ◽  
Lap Shear Strength ◽  
Lap Shear ◽  
Binder Ratio ◽  
Water To Binder Ratio

Full utilization of mechanical properties of glass fiber fabric-reinforced cement composites is very limited due to a low bond strength between fibers and the binder matrix. An experimental setup was developed and evaluated to correlate the mortar penetration depth with several key parameters. The studied parameters included fresh mortar properties, compressive and flexural strengths of mortar, the fabric/mortar bond strength, fabric pullout strength, and a single-lap shear strength. Results showed that an average penetration of mortar did not exceed 100 µm even at a higher water-to-binder ratio. The maximum particle size of the used fillers should be below an average spacing of single glass fibers, which in this case was less than 20 µm to avoid the sieving effect, preventing effective penetration. The pullout strength was strongly affected by the penetration depth, while the single-lap shear strength was also additionally affected by the mechanical properties of the mortar.

Microscopic Analysis and Study of High-Performance Seawater All-Coral Concrete

2019 ◽  
Vol 815 ◽  
pp. 216-222
Author(s):  
Chao Chen ◽  
Jin Ming Liu ◽  
Yang Yang ◽  
Zhi Guo Guo
Keyword(s):  
Mechanical Properties ◽  
Natural Environment ◽  
High Performance ◽  
Work Performance ◽  
Room Temperature ◽  
Microscopic Analysis ◽  
Internal Curing ◽  
Mix Design ◽  
Binder Ratio ◽  
Water To Binder Ratio

The ocean islands are far from inland and the concrete sandstone aggregates are scarce. In this paper, high-performance seawater all-coral concrete was developed by seawater mixing and room temperature maintenance design, and by optimizing the water-to-binder ratio, regulating internal curing, changing auxiliary cementing materials and blending ratio, incorporating expansion agent, adjusting fiber blending, etc. Combined with the consideration of work performance and mechanical properties, the concrete self-shrinkage is adjusted to further optimize the mix design. The mechanical properties of the optimized high-performance seawater all-coral concrete were studied, and the relevant durability tests were carried out according to the natural environment characteristics of the island. This is of great significance to the construction of island projects, repair and construction, and construction of protective projects [1].

scholarly journals The Influence of Water/Binder Ratio on the Mechanical Properties of Lime-Based Mortars with White Portland Cement

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 958
Author(s):  
Dejan Vasovic ◽  
Jefto Terzovic ◽  
Ana Kontic ◽  
Ruza Okrajnov-Bajic ◽  
Nenad Sekularac
Keyword(s):  
Mechanical Properties ◽  
Water Permeability ◽  
Repair Process ◽  
Lime Mortar ◽  
Architectural Practice ◽  
Mortar Strength ◽  
Influence Of Water ◽  
Binder Ratio ◽  
Speed Up ◽  
White Portland Cement

Protecting the built cultural heritage is one of the most important tasks in architectural practice. The process of repair is time-consuming, weather-dependent, and sensitive to materials applied. Introducing new materials in historic building repair in order to decrease the time needed for repair, brings some risk in the preservation process. The most common material for masonry repair is lime mortar. Adding cement to lime mortar can improve the mechanical properties of mortar and speed up the repair process. The high amount of cement may increase the strength, but decrease ductility and permeability of mortar, causing damages to protected buildings. An increase in strength with the smallest amounts of cement demands optimization of water content in the mixture. Tests were performed to investigate the influence of the water/binder (w/b = water/(lime + cement) ratio on mortar strength and water permeability. An air-entraining agent (AEG) was introduced to improve permeability. Results confirmed that adding small amounts of cement to lime (20% by weight) and decreasing of w/b ratio, improves the strength, with almost negligible influence on water permeability. The addition of very small amounts of AEG did not decrease the strength, nor the permeability.

scholarly journals Physical Characterization and Durability of Blended Cements Based on Brick Powder

2020 ◽  
Vol 30 (3) ◽  
pp. 201-213
Author(s):  
Ghania Nigri ◽  
Yacine Cherait ◽  
Soraya Nigri
Keyword(s):  
Mechanical Properties ◽  
Sulfuric Acid ◽  
Research Work ◽  
Blended Cement ◽  
Waste Materials ◽  
Partial Substitution ◽  
Blended Cements ◽  
Brick Powder ◽  
Crushed Brick ◽  
Durability Performance

Abstract This research work discusses both the physical and durability characteristics of newly blended cement containing waste crushed brick. This waste is used as a partial substitution for clinker in cement. Thus, blended cements are obtained by grinding and homogenizing clinker, waste brick, and gypsum. Four compositions containing 0%, 10%, 20%, and 30% of waste materials were prepared and submitted to various characterization tests. The introduction of brick powder improved the physical characteristics, therefore; it improved the mechanical properties and durability performance of the new cement compared to the reference, prepared with 0% addition. More particularly, it resisted sulfuric acid (H2SO4) attack after fixation of portlandite by pozzolan.

Ultrasound In Situ Testing of early Hydration Process of Supplementary Cementitious Pastes

2011 ◽  
Vol 477 ◽  
pp. 132-135 ◽  
Author(s):  
Zhi Yong Liu ◽  
Yun Sheng Zhang ◽  
Guo Wen Sun ◽  
Qian Jiang ◽  
Wei Wei Zhu
Keyword(s):  
Fly Ash ◽  
Silica Fume ◽  
Hydration Process ◽  
Mineral Admixtures ◽  
Early Hydration ◽  
Water To Cement Ratio ◽  
Influence Of Water ◽  
Binder Ratio ◽  
Water To Binder Ratio

The early hydration process was investigated using ultrasonic monitoring apparatus for pastes made with various mineral admixtures: silica fume (4%, 13%), slag (10%, 30%, 50%, 70%), and fly ash (10%, 30%, 50%). The influence of water to binder ratio (0.23, 0.35 and 0.53) was also studied. The results show that the hydration rate of cementitious material is obviously accelerated with decreasing in water to cement ratio and Silica fume addition, while the reverse phenomenon is observed when fly ash and slag are incorporated.

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