INVESTIGATION OF TENSILE PROPERTIES AND RESTRAINED SHRINKAGE BEHAVIOUR OF UHPFRC USED FOR STRENGTHENING AND REHABILITATION OF STRUCTURAL MEMBERS

2021 ◽  
Vol 77 (3) ◽  
pp. 92-107
Author(s):  
Tohru MAKITA ◽  
Yuji WATANABE
Keyword(s):  
Tensile Properties ◽  
Restrained Shrinkage ◽  
Structural Members ◽  
Shrinkage Behaviour

scholarly journals Shrinkage Behaviour of Fibre Reinforced Concrete with Recycled Tyre Polymer Fibres

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Marijana Serdar ◽  
Ana Baričević ◽  
Marija Jelčić Rukavina ◽  
Martina Pezer ◽  
Dubravka Bjegović ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Drying Shrinkage ◽  
Fibre Reinforced Concrete ◽  
Restrained Shrinkage ◽  
Polypropylene Fibres ◽  
Concrete Mixtures ◽  
Shrinkage Behaviour ◽  
Different Types ◽  
Waste Tyre ◽  
Recycled Polymer

Different types of fibres are often used in concrete to prevent microcracking due to shrinkage, and polypropylene fibres are among the most often used ones. If not prevented, microcracks can lead to the development of larger cracks as drying shrinkage occurs, enabling penetration of aggressive substances from the environment and reducing durability of concrete structures. The hypothesis of the present research is that polypropylene fibres, used in concrete for controlling formation of microcracks due to shrinkage, can be replaced with recycled polymer fibres obtained from end-of-life tyres. To test the hypothesis, concrete mixtures containing polypropylene fibres and recycled tyre polymer fibres were prepared and tested. Experimental programme focused on autogenous, free, and restrained shrinkage. It was shown that PP fibres can be substituted with higher amount of recycled tyre polymer fibres obtaining concrete with similar shrinkage behaviour. The results indicate promising possibilities of using recycled tyre polymer fibres in concrete products. At the same time, such applications would contribute to solving the problem of waste tyre disposal.

Shrinkage tests of two full-scale composite trusses

1992 ◽  
Vol 19 (2) ◽  
pp. 296-309 ◽  
Author(s):  
D. J. Laurie Kennedy ◽  
Anita Brattland
Keyword(s):  
Concrete Beams ◽  
Concrete Slab ◽  
Shrinkage Strain ◽  
Steel Beam ◽  
Restrained Shrinkage ◽  
Test Results ◽  
Linear Strain ◽  
Shrinkage Behaviour ◽  
Composite Section ◽  
Composite Steel

The shrinkage behaviour of two composite trusses with a span of 11.5 m was studied. Shrinkage measurements to determine the effects of slab shrinkage on truss deflections and member strains were recorded over periods of 65 and 85 days. A method is developed to compute shrinkage deflections, based on equilibrium of the shrinkage-induced forces at midspan, which gives excellent agreement with the test results. This method assumes a linear strain distribution through the depth and is based on the free shrinkage strain of the concrete and the average stress–strain characteristics of the concrete in tension under restrained shrinkage conditions as it drys, creeps, and eventually may crack as it is gradually loaded from the green state. The method is extended to composite steel-beam concrete-slab members. It is equivalent to Branson's "composite section method" provided that the correct values for the shrinkage strain and the effective modulus of elasticity of the concrete in tension are used in the latter. Key words: behaviour, composite steel–concrete beams, trusses, shrinkage deflections.

DOMAL AZ21X

Alloy Digest ◽  
1970 ◽  
Vol 19 (3) ◽  
Keyword(s):  
Heat Treatment ◽  
Magnesium Alloy ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Age Hardening ◽  
Structural Members ◽  
Hardening Heat Treatment

Abstract DOMAL AZ21X is a readily extrudable magnesium alloy used where moderate strength requirements will suffice. It does not respond to an age-hardening heat treatment. It is recommended for structural members, truck bodies and paneling. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: Mg-68. Producer or source: Dominion Magnesium Ltd.

ALLEGHENY LUDLUM TYPE 201

Alloy Digest ◽  
1995 ◽  
Vol 44 (10) ◽  
Keyword(s):  
Stainless Steel ◽  
Compressive Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Structural Members ◽  
Type 304

Abstract ALLEGHENY LUDLUM TYPE 201 stainless steel is similar to Type 301 in many ways, with applications ranging from structural members to auto wheel covers. The alloy can be substituted for Type 304 in a variety of mild environments. This datasheet provides information on composition, physical properties, hardness, tensile properties, and compressive strength. It also includes information on heat treating. Filing Code: SS-616. Producer or source: Allegheny Ludlum Corporation. See also Alloy Digest SS-997, September 2007.

ALCOA 6005 and 6105

Alloy Digest ◽  
2005 ◽  
Vol 54 (5) ◽  
Keyword(s):  
Aluminum Alloys ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Structural Members ◽  
Bend Strength ◽  
Medium Strength ◽  
6Xxx Series

Abstract Alloys 6605 and 6105 belong to the 6xxx series of aluminum alloys. They are medium strength alloys and are used as structural members such as handrails and ladders. This datasheet provides information on composition, physical properties, tensile properties, and bend strength. It also includes information on joining and surface treatment. Filing Code: AL-393. Producer or source: Alcoa Engineered Products.

Review on Experimental Study on Effect of Corrosion In Reinforced Concrete Fly-Ash Beam

2020 ◽  
pp. 92-96
Author(s):  
Shubham N. Dadgal ◽  
Shrikant Solanke
Keyword(s):  
Fly Ash ◽  
Bond Strength ◽  
Structural Damage ◽  
Pullout Test ◽  
Partial Replacement ◽  
Structural Members ◽  
Accelerated Corrosion ◽  
Resistivity Method ◽  
Electrical Resistivity Method ◽  
Structural Failures

In modern days for structures in coastal areas it has been observed that the premature structural failures are occurs due to corrosion of the reinforcements of the designed structural member. The corrosion causes the structural damage which in turn leads to reduction in the bearing capacity of the concerned structural members. The aim of this study was to study the effect of partial replacement of fly ash to minimize the corrosion effect. Beams were designed and corroded by using artificial method known accelerated corrosion method. The beams were then tested for flexural and bond strength. Also the weight loss of the reinforced bars was been determined using electrical resistivity method. The fly ash will replace by 10% and 15%.The strength will calculate at varying percentage of corrosion at 10% and 15%. Beams will cast at M25 grade concrete. The flexural strength will test by using UTM and the bond strength will calculate using pullout test.

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