The effect of water cement ratio on the characteristics of multi-walled carbon nanotube reinforced concrete

2019 ◽

Vol 8 (9S3) ◽

pp. 1595-1597

Keyword(s):

Reinforced Concrete ◽

Steel Fiber ◽

Fiber Content ◽

Fibre Reinforced Concrete ◽

High Quality ◽

Cement Ratio ◽

Water Cement Ratio ◽

Effect Of Water ◽

Content Measurement ◽

Hybrid Fibre

This paper presents to consider quality and exhibitions of steel fiber fortified cement (SFRC) and half and half fiber strengthened cement (HFRC) distinctive water concrete proportion just as 0.4, 0.35. The half breed filaments consider in the mix of snared end steel strands and polypropylenes filaments. Technique: To think about the compressive quality in the fiber content measurement Vf ran from 0.5 to 2.0 percent of steel filaments, and 0.8SF0.2PP, 0.7SF0.3PP, 0.6SF0.4PP, 0.5SF0.5PP of half breed strands for two diverse water bond proportion, the evaluation of cement utilized for this examination M40. Totally16 blends were arranged and tried in the lab. Results: at long last, 1.0% of SFRC and 0.8SF 0.2 PP HFRC gives great quality for both water bond proportion Less quantities of splits were seen in fiber fortified high quality solid examples, which demonstrate an improved malleability with the expansion of strands in the framework.

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Effect of Water-Cement Ratio on Flexural Strength of RC Beams Made with Partial Replacement of Coarse Aggregates with Coarse Aggregates from Old Concrete

Engineering, Technology & Applied Science Research ◽

10.48084/etasr.2499 ◽

2019 ◽

Vol 9 (1) ◽

pp. 3826-3831

Author(s):

M. Oad ◽

A. H. Buller ◽

B. A. Memon ◽

N. A. Memon ◽

Z. A. Tunio ◽

...

Keyword(s):

Reinforced Concrete ◽

Flexural Strength ◽

Concrete Beams ◽

Recycled Concrete ◽

Reinforced Concrete Beams ◽

Partial Replacement ◽

Cement Ratio ◽

Water Cement Ratio ◽

Coarse Aggregates ◽

Effect Of Water

This research paper presents an experimental evaluation of the effect of water-cement ratio on the flexural strength of reinforced concrete beams made with 50% replacement of coarse aggregates with recycled concrete aggregates (RCA). 72 reinforced concrete beams were cast using 0.54, 0.6, 0.65 and 0.70 water-cement ratio. In each ratio, 12 beams were cast using RCA and 3 beams were cast using all-natural coarse aggregates (NCA). Beams were cured for 7 and 28 days. After curing, all beams were tested with central point load in a universal load testing machine. From the obtained results, it is observed that the maximum reduction in flexural strength of RCA beams is about 28% when compared to the 0.54 w/c ratio beams of the same group and 31.75% in comparison to NCA beams cast with same w/c ratio. The maximum deflection and average strain in beams remained within limits. The observed cracking pattern shows shear failure of all beams.

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ASSESSMENT OF THE RELIABILITY OF THE REINFORCED CONCRETE LAYER IN STRUCTURES

Mokslas - Lietuvos ateitis ◽

10.3846/mla.2020.11395 ◽

2020 ◽

Vol 12 (0) ◽

pp. 1-4

Author(s):

Andrius Patapavičius

Keyword(s):

Reinforced Concrete ◽

Cement Ratio ◽

Water Cement Ratio ◽

Reliability Indices ◽

Effect Of Water ◽

Concrete Layer ◽

Quality Assessments

An urgency to use probability-based methods and probabilistic reliability indices in long-term quality assessments and predictions of reinforced concrete products and structures is under consideration. Carbonation nature and depth of protective concrete covers of reinforcement bars and stirrups are analysed. Effect of water-cement ratio on the carbonation rate of protective concrete covers is discussed. Analyzes of reliability of structures reinforcement with composite as spiral (transverse) usage and influence. Presented applied equations and the calculation example demonstrate a simplicity and necessities of probability-based methods.

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