scholarly journals Effect of Water Cement Ratio In Hybrid Fibre Reinforced Concrete

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.

This paper displays the quality and exhibitions of steel fiber fortified cement (SFRC) The steel fiber consider in the of snared end steel filaments. To read the youthful's modulus for concrete the fiber content measurements Vf extended from 0.5 to 2.0 percent of steel fibres,.10 blends included one control blend (without filaments) were arranged and tried in the research facility Less quantities of breaks were seen in fiber fortified high quality solid examples, which demonstrate an improved pliability with the expansion of strands in the network.


2010 ◽  
Vol 168-170 ◽  
pp. 1742-1748
Author(s):  
Yan Zhong Ju ◽  
Feng Wang ◽  
De Hong Wang

To study the mechanical properties of RPC performance and freeze-thaw resistance,through the experimental study discussed the water-cement ratio, silica fume cement ratio, steel fiber content, curing system and other factors on the mechanical properties of reactive powder concrete and anti-freezing properties. Research indicates that many factors in the RPC, the water cement ratio is the most important factor, followed by the silica fume cement ratio, finally the steel fiber content, and curing system for the growth of its early strength also have a greater role.


2019 ◽  
Vol 9 (1) ◽  
pp. 3826-3831
Author(s):  
M. Oad ◽  
A. H. Buller ◽  
B. A. Memon ◽  
N. A. Memon ◽  
Z. A. Tunio ◽  
...  

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.


2020 ◽  
Vol 12 (0) ◽  
pp. 1-4
Author(s):  
Andrius Patapavičius

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.


1990 ◽  
Vol 211 ◽  
Author(s):  
Miguel A. Sanjuan ◽  
A. Moragues ◽  
B. Bacle ◽  
C. Andrade

AbstractThe permeability of concrete to gases is of direct importance to the durability of concrete structures, because of carbon dioxide flowing through the concrete favour lime carbonation and reinforcing steel corrosion.Mortar with and without polypropylene fibres having water/cementitious ratios of 0.30, 0.35 and 0.40 and a cement/sand ratio of 1/1 were studied. Polypropylene dosage varied from 0.1 to 0.3% by volume of cement.The characterization of mortar permeability was made using cylindrical shaped samples (3 cm height and 15 cm diameter). These specimens were 28 days cured and then dried before the test.The addition of fibres results in a decrease of air permeability. Variation of the water/cement ratio is of lesser importance than fiber addition.


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