Durable Overlay Systems with Engineered Cementitious Composites (ECC) / Dauerhafte Beschichtungssysteme aus technisch entwickelten zementgebundenen zusammengesetzten Werkstoffen (ECC)

Wittmann, F. H.; Martinola, Giovanni

doi:10.1515/rbm-2003-5760

Cited by 4 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This increase in bending strength results from the tightening by directed polymer molecules the porous contact zone between slurry and aggregate grains. Other causes of significant increase of bending strength for polymer modified concrete is composite deformability improvement [3] as well as the ability of polymer molecules to bridge the microcracks [6].…”

Section: Analysis and Discussion Of Tests Resultsmentioning

confidence: 99%

“…The total magnitude of shrinkage strains depends on many different factors, among which the most important are: type, characteristic surface, chemical composition and amount of dosed cement. The biggest changes in volume indicate cements with high content of C 3 A, while the smallest -with high level of C 2 S [6]. Hence, due to shrinkage reduction, it is favourable to apply the lowest possible amount of cement with small characteristic surface and high content of belit.…”

Section: Methods For Restricting the Shrinkage Of Cement Compositementioning

confidence: 99%

See 1 more Smart Citation

Influence of Co-Polymer Dispersion Additives onto Shrinkage Strains for Cementitous Mortars and Concretes

Gruszczyński

2011

AMR

View full text Add to dashboard Cite

In the paper there is presented the influence of different types of co-polymer dispersion additives onto the magnitude of shrinkage and strength properties of cement composites. The effect of application of such additives was compared and confronted with the action of widely used classical admixture reducing shrinkage based on multi-molecular alcohol (propylene alcohol). As a result of conducted tests the significant reduction in shrinkage strains and increase in bending strength was observed due to the application of co-polymer dispersion with the amount of at least 5% of the cement mass. Reduction of shrinkage and improvement of serviceability properties to great extent prejudge the technical attractiveness of co-polymer and cement materials for the cases of concrete structures repairs and constructing industrial floors without joints.

show abstract

Section: Analysis and Discussion Of Tests Resultsmentioning

confidence: 99%

Section: Methods For Restricting the Shrinkage Of Cement Compositementioning

confidence: 99%

Influence of Co-Polymer Dispersion Additives onto Shrinkage Strains for Cementitous Mortars and Concretes

Gruszczyński

2011

AMR

View full text Add to dashboard Cite

show abstract

“…These types of damage can be repaired using a patching method combined with a strengthening technique. However, some researchers have noted that the patching method might fail to restore the damaged concrete due to cracks and delamination of the patch repair material [2,3]. These failures are closely related to the difference in the extent of shrinkage between the repair layer and the substrate concrete.…”

Section: Introductionmentioning

confidence: 99%

Creep Behavior of Fiber Reinforced Mortars and Its Effect to Reduce the Differential Shrinkage Stress

Sangadji,

Safitri,

Arifin

et al. 2023

Civ Eng J

View full text Add to dashboard Cite

This research aims to develop durable repair materials that can resist shrinkage cracking by exploring the role of creep in reducing shrinkage stress. In this regard, the creep effect can only be quantified if an accurate creep prediction model and theoretical analysis of the shrinkage stress in the patch repair system exist. For this purpose, the research was carried out in the following sequences: first, the research investigated the short-term creep of the patch repair materials containing accelerator and micro-synthetic fibers in the 0.00–0.12% volume fraction range. This short-term creep was measured on five-cylinder specimens (having a diameter of 75 mm and a height of 275 mm). Three specimens were used to determine the deformation of the repair material under unloading conditions, while those remaining were used to determine the total deformation under loading conditions. The amount of creep deformation was determined by taking away the unloaded (shrinkage) and instantaneous (elastic) deformations from the total deformation of the loaded specimens. Secondly, a modified prediction model of ACI 209R-08 is introduced to accurately capture the rate and magnitude of the observed creep of the repair materials. Finally, a formulated theoretical analysis of shrinkage stress in the patch repair system was proposed to examine how creep potentially reduces the repair material's cracking tendency. The results show that the asymptotic value of the creep curve is attained at an earlier age and that its magnitude is greater than that of most concrete. The modified ACI 209R-08 prediction model can closely estimate the repair materials' creep behavior. The best-fit line, residual values, and coefficient of error analyses confirm the modified model's prediction accuracy. The analysis of tensile stress development in the repair layer suggests that creep can reduce stress by up to 50%. With such a reduction, the repair material is expected to be durable in resisting shrinkage and cracking tendency. Doi: 10.28991/CEJ-2023-09-08-014 Full Text: PDF

show abstract

“…This method of repair is easy to be carried out but it requires a compatible patch repair material. Otherwise premature cracking and delamination of the patch repair material may be observed [2,3]. To obtain compatible and durable patch repair material that can resist cracking and delamination tendency, one may attempt to achieve by developing a high strength repair mortar.…”

Section: Introductionmentioning

confidence: 99%

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

Kristiawan

Supriyadi

Prokoso³

et al. 2017

KEM

View full text Add to dashboard Cite

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.

show abstract

Durable Overlay Systems with Engineered Cementitious Composites (ECC) / Dauerhafte Beschichtungssysteme aus technisch entwickelten zementgebundenen zusammengesetzten Werkstoffen (ECC)

Cited by 4 publications

References 0 publications

Influence of Co-Polymer Dispersion Additives onto Shrinkage Strains for Cementitous Mortars and Concretes

Influence of Co-Polymer Dispersion Additives onto Shrinkage Strains for Cementitous Mortars and Concretes

Creep Behavior of Fiber Reinforced Mortars and Its Effect to Reduce the Differential Shrinkage Stress

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

Contact Info

Product

Resources

About