Bond Strength Characteristic of Concrete Patch Repair Material Made from Unsaturated Polyester Resin (UPR)-Mortar

2015 ◽  
Vol 754-755 ◽  
pp. 442-446 ◽  
Author(s):  
Stefanus Adi Kristiawan ◽  
Ageng Bekti Prakoso
Keyword(s):  
Bond Strength ◽  
Strength Characteristic ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
High Strength ◽  
Unsaturated Polyester Resin ◽  
Test Method ◽  
Patch Repair ◽  
Repair Materials ◽  
Bond Plane

Patch repair materials made from unsaturated polyester resin (UPR)-mortar have been investigated to determine their bond strength characteristic by slant shear test method. The relative mechanical properties of UPR-mortar and substrate concrete for composing the specimens are: lower modular and high strength ratio. The experimental results show that the combination of materials causes the observed bond strength are dictated by failure of substrate concrete. The actual bond strength could be higher as most of the specimens fail without separation of the UPR-mortar and substrate concrete at the bond plane.

Flexural Behaviour of Patch-Repair Material Made from Unsaturated Polyester Resin (UPR)-Mortar

2016 ◽  
Vol 857 ◽  
pp. 426-430 ◽  
Author(s):  
Stefanus Adi Kristiawan ◽  
Ageng Bekti Prakoso
Keyword(s):  
Fly Ash ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Flexural Modulus ◽  
Unsaturated Polyester Resin ◽  
Modulus Of Rupture ◽  
Patch Repair ◽  
Early Age ◽  
Flexural Performance ◽  
Repair Materials

Repair materials have been produced using an unsaturated polyester resin (UPR) as a matrix of a binder. Other ingredients are sand, cement and fly ash. No water is added to the mixture, so both the cement and fly ash only act as fillers. The UPR content is in the range of 50-60% by weight of total filler (cement plus fly ash). Their flexural performance has been characterized in term of the load-deflection behaviour, modulus of rupture, flexural modulus and stiffness. The results show that the flexural capacity of these materials at early age is at least 20 MPa, but they tend to have a lower elastic modulus. At early age, the higher amount of UPR content tends to gain a higher flexural characteristic. However, at later age there is a little influence of UPR content.

Mechanical Properties of Unsaturated Polyester Resin (UPR)-Mortar and its Potential Application to Restore the Strength and Serviceability of Patched Reinforced Concrete Slab

2017 ◽  
Vol 737 ◽  
pp. 560-566 ◽  
Author(s):  
Stefanus Kristiawan ◽  
Agus Supriyadi ◽  
Ageng Bekti Prokoso ◽  
Siti Rahmi
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Potential Application ◽  
Polyester Resin ◽  
Concrete Slab ◽  
Unsaturated Polyester ◽  
Unsaturated Polyester Resin ◽  
Patch Repair ◽  
Repair Material ◽  
Reinforced Concrete Slab

Degradation of reinforced concrete could occur in various forms including spalling of concrete cover as a result of reinforcement corrosion. The degradation would shorthen the service life of the reinforced concrete structure. Patch repair method may be employed to recover this type of degradation using a suitable patch repair material. The authors have developed a patch repair material made from unsaturated polyester resin (UPR)-mortar. In this paper, the mechanical properties of this material which includes compressive strength, elastic modulus, flexural strength and bond strength are highlighted. Comparisons are also made with the normal mortar to emphasize the superior properties of UPR-mortar. Based on these properties, the potential application of UPR-mortar for repairing damaged reinforced concrete slab is examined through finite element simulation. It is pointed out that the tensile stress intensity in the UPR-layer is reduced with a consequence of reducing a risk of cracking in the repair zone. In addition, the patching of damaged zone with UPR-mortar could minimize the deflection.

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