Aggregates segregation in rubberized mortar

Structures ◽  
2020 ◽  
Vol 26 ◽  
pp. 778-784
Author(s):  
Diego David Pinzón Moreno ◽  
Sebastião Ribeiro ◽  
Clodoaldo Saron
Keyword(s):  
Rubberized Mortar

Investigation on Properties and Flow Degree of Rubberized Mortar under Dynamic Load in Metro

2014 ◽  
Vol 1061-1062 ◽  
pp. 382-385
Author(s):  
Jun Yu ◽  
Hai Bin Zhu ◽  
Ke Zhong Wang
Keyword(s):  
Dynamic Load ◽  
Flow Property ◽  
Crumb Rubber ◽  
Flow Properties ◽  
Vibration Resistance ◽  
Different Diameters ◽  
Rubberized Mortar

It is one of focus topics that metro vibration affects foundations and environments. Assumed that crumb rubber mortar can be injected into foundations to form separate vibration layerbecause crumb rubber mortar is with better ductility and properties of vibration resistance,the layer decreases the effect of transportation load on foundation. Different diameters and volumes of rubber power were joined into the mortar to form rubber mortar by experiments. Then their flow degree and strenghth were measured and compared with ordinary mortar. The result shows that the rubber with smaller diameters can improve flow properties of mortar. When the volume inserting is ten percent of total sand volume, the flow property is best. The rubber mortar with best flow property was conserved for twenty-eight days. The damp property and impact resistant were determined under metro dynamic load. The experiment found that when the volume inserting is twenty percent of total volume, the damp value was improved twenty percent with twenty-five percent of absorbing energy and better separate vibration property. Therefore, the separate vibration layer can largely reduce the effect of vibration from metro and decrease the settlement of foundations of metro.

Improving Properties of Rubberized Mortar with Polyacrylamide

2014 ◽  
Vol 528 ◽  
pp. 77-82
Author(s):  
Chun Ku Lu ◽  
Cheng Haw Lee ◽  
I Feng Wang
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Effective Means ◽  
Crumb Rubber ◽  
Corrosion Property ◽  
Sem Images ◽  
Waste Tire ◽  
Compressive And Flexural Strengths ◽  
Commercial Applications ◽  
Rubberized Mortar

The waste tire can be added to concrete to form a composite material, known as “Rubcrete”. However, addition of crumb rubber leads to degradation of physical properties of the concrete. In this study, by treating the crumb rubber with Polyacrylamide (PAM), we have improved properties of the rubberized mortar. Specifically, the compressive and flexural strengths of the specimen at 56 days were improved up to 19% and 27%, respectively. Dramatically, the anti-corrosion property of this new rubberized mortar is much superior to that of the original mortar. The addition of rubber also turned crack from fragility crack to ductility crack. To show the impacts of PAM modification, the specimens of rubberized mortar with and without PAM modification, were observed with SEM images. Experimental results showed that PAM treatment of crumb rubber is an effective means to improve the mechanical properties of the rubberized mortar; lends itself to possible commercial applications.

Durability of Rubberized Mortar and Concrete

2007 ◽  
Vol 19 (2) ◽  
pp. 173-178 ◽  
Author(s):  
İlker Bekir Topçu ◽  
Abdullah Demir
Keyword(s):  
Rubberized Mortar

scholarly journals Effect of Water-Cement Ratio on the Properties of NaOH-Treated Rubberized Mortar

2020 ◽  
Vol 862 ◽  
pp. 135-139
Author(s):  
Dhabit Zahin Alias Tudin ◽  
Ahmad Nurfaidhi Rizalman
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Crumb Rubber ◽  
Fine Aggregate ◽  
Volume Percentage ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Effect Of Water ◽  
Hardened Properties ◽  
Rubberized Mortar

In this study, crumb rubber was used to partially replaced fine aggregate in mortar mixture by 5, 10, 15 and 20 volume percentage (vol%) with untreated and NaOH-treated crumb rubber. There were three (3) different water-cement ratio used which are 0.45, 0.50 and 0.55. Thus, the total number of mixtures was 27. The mortars were tested for flowability, compressive strength, flexural strength and density. Based on the results, higher water cement ratio and percentage of crumb rubber replacement increased the flowability but lowered the density, compressive strength and flexural strength of the rubberized mortar. It was also discovered that the significant effect of water-cement ratio on the fresh and hardened properties of the rubberized mortar was due to the water content in the mixture. Meanwhile, the use of NaOH as treatment to crumb rubber improved the flowability, compressive strength and flexural strength of the rubberized mortar.

Rubberized mortar: The influence of aggregate granulometry in mechanical resistances and acoustic behavior

2019 ◽  
Vol 200 ◽  
pp. 248-254 ◽  
Author(s):  
A.F. Angelin ◽  
E.J.P. Miranda ◽  
J.M.C. Dos Santos ◽  
R.C.C. Lintz ◽  
L.A. Gachet-Barbosa
Keyword(s):  
Acoustic Behavior ◽  
Rubberized Mortar

Effects of partial oxidation of crumb rubber on properties of rubberized mortar

2010 ◽  
Vol 41 (8) ◽  
pp. 613-616 ◽  
Author(s):  
Liang-Hsing Chou ◽  
Cho-Kun Yang ◽  
Maw-Tien Lee ◽  
Chia-Chen Shu
Keyword(s):  
Partial Oxidation ◽  
Crumb Rubber ◽  
Rubberized Mortar

scholarly journals Effects of Rubber Size on the Cracking Resistance of Rubberized Mortars

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3132 ◽  
Author(s):  
Yong Yu ◽  
Han Zhu
Keyword(s):  
Particle Size ◽  
Mechanical Test ◽  
Rubber Particle ◽  
Inhibitory Effect ◽  
Interfacial Transition Zone ◽  
Particle Sizes ◽  
Cracking Resistance ◽  
Eccentric Ring ◽  
Rubberized Mortar ◽  
Restrained Ring

This study investigated the cracking resistance of rubberized cement-based mortars. Three rubber particle sizes were used: Rubber A (major particle size 2–4 mm), Rubber B (major particle size 1–3 mm), and Rubber C (major particle size 0–2 mm). Traditional restrained ring shrinkage test (RRST), new restrained squared eccentric ring shrinkage test (RSERST), mechanical test, and scanning electron microscopy test were conducted. Results showed that the cracking inhibitory effect of Rubber B was the highest among the three rubber particle sizes. SEM results revealed that the particle size of the rubber does not have much effect on the ITZ (interfacial transition zone) position of rubber and cement paste. For the strength differences of the three types of rubberized mortar, it is mainly because the specific surface area increased as the rubber size decreased, which lead to more ITZ positions and pore structures. Our study verified that RSERST can predict the cracking position and shorten the test period. Compared with RRST, RSERST can also increase the restriction degree. K R is defined as the intensification factor of RSERST restriction degree. The average intensification factor is K R ¯ = 1.17 .

scholarly journals On the Fresh/Hardened Properties of Cement Composites Incorporating Rubber Particles from Recycled Tires

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Alessandra Fiore ◽  
Giuseppe Carlo Marano ◽  
Cesare Marti ◽  
Marcello Molfetta
Keyword(s):  
Cement Composite ◽  
Cement Composites ◽  
Test Results ◽  
Freezing And Thawing ◽  
Chloride Permeability ◽  
Fine Aggregates ◽  
Rubber Particles ◽  
Suitable Amount ◽  
Hardened Properties ◽  
Rubberized Mortar

This study investigates the ameliorative effects on some properties of cement-based materials which can be obtained by incorporating rubber particles as part of the fine aggregates. The aim is to find out optimal cement composite/mortar mixtures, containing recycled-tyre rubber particles, suitable for specific engineering applications. Different percentages of rubber particles, from 0% to 75%, were used and, for each percentage, the suitable amount of sand was investigated in order to achieve the best fresh/hardened performances. In particular the following characteristics were examined: density, compressive strength, modulus of elasticity, shrinkage, weight loss, flexural behaviour, thermal conductivity, rapid freezing and thawing durability, and chloride permeability. The experimental results were compared with the ones of cement composite specimens without rubber aggregates. Test results show that the proposed rubberized mortar mixes are particularly suitable for some industrial and architectural applications, such as under-rail bearings, road constructions, paving slabs, false facades, and stone backing.

Sign in / Sign up

Export Citation Format

Share Document