A laboratory evaluation on skid resistance performance of surface coatings manufactured by both natural aggregates and by-products

2017 ◽  
pp. 929-934
Author(s):  
I. Gökalp ◽  
V.E. Uz ◽  
M. Saltan
Keyword(s):  
Surface Coatings ◽  
Laboratory Evaluation ◽  
Skid Resistance ◽  
Natural Aggregates ◽  
Resistance Performance ◽  
By Products

scholarly journals Mortars with Recycled Aggregates from Building-Related Processes: A ‘Four-Step’ Methodological Proposal for a Review

2021 ◽  
Vol 13 (5) ◽  
pp. 2756
Author(s):  
Federica Vitale ◽  
Maurizio Nicolella
Keyword(s):  
Building Materials ◽  
Thermal Analyses ◽  
Construction Materials ◽  
Physical And Mechanical Properties ◽  
Research Trends ◽  
Mix Design ◽  
Recycled Aggregates ◽  
Design Parameters ◽  
Natural Aggregates ◽  
By Products

Because the production of aggregates for mortar and concrete is no longer sustainable, many attempts have been made to replace natural aggregates (NA) with recycled aggregates (RA) sourced from factories, recycling centers, and human activities such as construction and demolition works (C&D). This article reviews papers concerning mortars with fine RA from C&D debris, and from the by-products of the manufacturing and recycling processes of building materials. A four-step methodology based on searching, screening, clustering, and summarizing was proposed. The clustering variables were the type of aggregate, mix design parameters, tested properties, patents, and availability on the market. The number and the type of the clustering variables of each paper were analysed and compared. The results showed that the mortars were mainly characterized through their physical and mechanical properties, whereas few durability and thermal analyses were carried out. Moreover, few fine RA were sourced from the production waste of construction materials. Finally, there were no patents or products available on the market. The outcomes presented in this paper underlined the research trends that are useful to improve the knowledge on the suitability of fine RA from building-related processes in mortars.

scholarly journals Study of the Optimal Dosage of Celullose Ash as a Contribution Filler in Asphalt Mixtures Based on Its Adhesiveness under Moisture Conditions

2021 ◽  
Vol 13 (2) ◽  
pp. 854
Author(s):  
Diana Movilla-Quesada ◽  
Aitor C. Raposeiras ◽  
Manuel Lagos-Varas ◽  
Osvaldo Muñoz-Cáceres ◽  
Valerio-Carlos Andrés-Valeri ◽  
...  
Keyword(s):  
Latin American ◽  
Critical Concentration ◽  
Resource Scarcity ◽  
Wear Loss ◽  
Optimal Dosage ◽  
Bituminous Mixtures ◽  
Forestry Sector ◽  
Natural Aggregates ◽  
Moisture Conditions ◽  
By Products

Chile is the first Latin American country to begin an “ecological overdraft”, as established by the Global Footprint Network (GFN). This implies that the country’s ecological footprint has exceeded the global average bio-capacity. The consumption of natural aggregates for construction in Chile has grown by around 6.6% in the last year, with around 120 million tons being extracted. Given the above, it is important to seek alternatives that help to minimize the problem of resource scarcity, as well as the recovery of industrial by-products and/or waste. The Chilean forestry sector has also grown in recent years, generating approximately 4000 metric tons of waste in 2018, which was deposited in landfills or disposed of on forest roads. The present research is focused on the reuse and possible recovery of ash from the incineration of cellulose as a filler in bituminous mixtures. We analyze the adhesiveness of the filler/bitumen system in dry and wet states, based on the Cantabro wear loss test. The results obtained show that the limit of the relation between the volumetric concentration and critical concentration (Cv/Cs) is 1 for the addition of ash and that concentrations lower than or equal to this value present controlled losses, with 1.00 being the optimal (Cv/Cs) ratio that allows better behavior against the effect of water.

scholarly journals Degradation Prediction Model for Friction of Road Pavements with Natural Aggregates and Steel Slags

2019 ◽  
Vol 10 (1) ◽  
pp. 32 ◽  
Author(s):  
Bruno Crisman ◽  
Giulio Ossich ◽  
Paolo Bevilacqua ◽  
Roberto Roberti
Keyword(s):  
Residual Life ◽  
Steel Slag ◽  
Steel Production ◽  
Threshold Level ◽  
Skid Resistance ◽  
Concrete Pavements ◽  
Cumulative Number ◽  
The Road ◽  
On The Road ◽  
Natural Aggregates

Steel production wastes (steel slags) are used more often in asphalt concrete pavements as a valuable replacement for natural aggregates, which are becoming increasingly rare. In this paper authors investigate the polishing characteristics of aggregates, and in particular of steel slags, used in bituminous road surfacing, are a major factor in determining the resistance to skidding. The main purpose of the study is the identification of a suitable degradation model, based on friction indicators, in the laboratory, as well as the comparison of in-situ pavement skid resistance with the cumulative number of passing vehicles over the years. The model predicts the expected resistance to skidding of the road surface based on the knowledge of the polished stone value (PSV) of the aggregates and the expected traffic on the road. In this study, several types of aggregates were compared: steel slag, limestone, limestone and slag mixture, diabase, Criggion stone and basalt. Using a standard PSV test, it was found that the aggregates did not reach the lower value of skid resistance (equilibrium value). The analysis of the British Portable Number (BPN) data versus polishing time allowed to empirically derive a regression model for each investigated aggregate. Hence, it appears possible to define both an investigatory level and threshold level to predict the actual residual life of the pavement from the examination of skid resistance.

scholarly journals Green Concrete: By-Products Utilization and Advanced Approaches

2019 ◽  
Vol 11 (19) ◽  
pp. 5145 ◽  
Author(s):  
Al-Mansour ◽  
Chow ◽  
Feo ◽  
Penna ◽  
Lau
Keyword(s):  
Carbon Footprint ◽  
Review Paper ◽  
Rice Husk Ash ◽  
Sustainable Concrete ◽  
Coarse Aggregates ◽  
Natural Aggregates ◽  
Carbon Dioxide Co2 ◽  
Furnace Slag ◽  
By Products ◽  
Slag Waste

The popularity of concrete has been accompanied with dreadful consumptions that have led to huge carbon footprint in our environment. The exhaustion of natural resources is not yet the problem, but also the energy that is needed for the fabrication of the natural materials, in which this process releases significant amount of carbon dioxide (CO2) emissions into the air. Ordinary Portland Cement (OPC) and natural aggregates, which are the key constituents of concrete, are suggested to be recycled or substituted in order to address the sustainability concern. Here, by-products have been targeted to reduce the carbon footprint, including, but not limited to, fly ash, rice husk ash, silica fume, recycled coarse aggregates, ground granular blast-furnace slag, waste glass, and plastic. Moreover, advanced approaches with an emphasis on sustainability are highlighted, which include the enhancement of the hydration process in cement (calcium-silicate hydrate) and the development of new materials that can be used in concrete (e.g. carbon nanotube). This review paper provides a comprehensive discussion upon the utilization of the reviewed materials, as well as the challenges and the knowledge gaps in producing green and sustainable concrete.

Survey of State Practices to Control Skid Resistance on Hot-Mix Asphalt Concrete Pavements

1996 ◽  
Vol 1536 (1) ◽  
pp. 52-58 ◽  
Author(s):  
P. W. Jayawickrama ◽  
R. Prasanna ◽  
S. P. Senadheera
Keyword(s):  
Asphalt Concrete ◽  
Hot Mix Asphalt ◽  
Design Guidelines ◽  
State Agency ◽  
Laboratory Evaluation ◽  
Insoluble Residue ◽  
Petrographic Analysis ◽  
Skid Resistance ◽  
Concrete Pavements ◽  
Design Procedures

A nationwide survey on design methods for achieving adequate skid resistance on hot-mix asphalt concrete pavements was conducted. Information was collected on the design practices used by 48 state departments of transportation (DOTs) in the contiguous United States. Survey findings show that the emphasis placed on the skid resistance aspects in various state DOT design procedures vary considerably. Based on the data collected, 21 out of 48 state highway agencies either do not have any design guidelines specifically addressing pavement skid behavior or assume that adequate skid resistance may be ensured through proper mix design. The general approach used by these agencies involves frequent monitoring of pavements to identify pavements with skid-related problems so that appropriate action may be taken. Survey findings indicated that state DOTs that consider skid resistance in their design procedures emphasize controlling the quality of coarse aggregates used in pavement surface course construction. The procedures used for aggregate qualification, however, vary significantly from one state agency to another. Some state DOTs rely on simple aggregate classification methods based on aggregate type, whereas others perform detailed laboratory evaluation. The laboratory test procedures that are most commonly used in evaluating aggregate frictional properties are the polish value test, acid insoluble residue test, and petrographic analysis. In addition to laboratory testing, Florida, Kentucky, Pennsylvania, and Texas use alternative procedures to qualify aggregates based on their field skid performance.

Safe and Eco-Friendly Haze-Eliminating Pavement Coating

2014 ◽  
Vol 1052 ◽  
pp. 387-391
Author(s):  
Jiu Peng Zhang ◽  
Yun Hang Wang ◽  
Na Li ◽  
Zhi Jun Duan ◽  
Lei He ◽  
...  
Keyword(s):  
Water Resistance ◽  
Chemical Properties ◽  
Catalytic Degradation ◽  
Skid Resistance ◽  
Physical And Chemical Properties ◽  
Obvious Effect ◽  
Optimum Dosage ◽  
Physical And Chemical ◽  
Resistance Performance ◽  
And Chemical Properties

The main purpose of the pavement coating is to reduce the haze by absorbing and degrading pm2.5 from automobile exhaust. Based on the investigation and analysis of the source and main composition of haze and pm2.5 and the physical and chemical properties of haze, the paper proposes the method of combining the absorption and catalytic degradation of active Al2O3 and nanometer TiO2 together. Through the experiments, the pavement coating which has the different ratio of active Al2O3 and nanometer TiO2 behaves differently on the effect of absorption and degradation of pm2.5, and the optimum dosage and ratio of active Al2O3 and nanometer TiO2 was found finally. The pavement coating which use the optimum dosage has the more obvious effect under the ultraviolet. And the water resistance and skid resistance performance can also meet the requirements.

scholarly journals A Review on Acoustic and Skid Resistance Solutions for Road Pavements

2021 ◽  
Vol 6 (3) ◽  
pp. 41 ◽  
Author(s):  
Sergio Copetti Callai ◽  
Cesare Sangiorgi
Keyword(s):  
Surface Layer ◽  
Traffic Accidents ◽  
Asphalt Mixtures ◽  
Skid Resistance ◽  
Noise Generation ◽  
Road Noise ◽  
Pavement Surface ◽  
Acoustic Impact ◽  
Resistance Performance

As cities grow in size, traffic also increases, thus making the population more exposed to road noise and traffic accidents. It is therefore important to study and understand which properties of the pavement influence its acoustic impact and skid resistance performance. The pavement texture plays a major role in generating noise and friction, and it can be engineered in order to control both of them at the same time. The phenomena regulating skid resistance are well understood today. The same applies for noise generation and propagation; the literature contains methods of designing the pavement surface layer to achieve consistent results. Several types of solutions can be found for asphalt mixtures, most of them derived from decades of studies and research. They use different approaches to be effective for noise and friction, but all have in common the control of the surface’s macro and microtexture. Finally, some considerations are made regarding novel paving solutions with artificial aggregates instead of natural ones to address noise and skid resistance.

scholarly journals The Influence of the Environment on the Properties of Hybrid Cement-Based Concrete with Steel and Air-Cooled Slags

Crystals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1087
Author(s):  
Pavel Martauz ◽  
Vojtěch Václavík ◽  
Branislav Cvopa
Keyword(s):  
Steel Slag ◽  
Blended Cement ◽  
Physical And Mechanical Properties ◽  
Outdoor Environment ◽  
Aqueous Environment ◽  
Test Results ◽  
Mixture Designs ◽  
Natural Aggregates ◽  
By Products

This article presents the results of research that dealt with the development of non-traditional concrete using a hybrid alkali-activated cement. It is concrete based on by-products from a metallurgical plant that replaced 100% of the natural aggregates. Steel slag (CSS, fraction: 0/8 mm) was used as a filler in combination with air-cooled slag (ACBFS, fraction: 8/16 mm and 16/32 mm). Portland blended cement (CEM II/B-S 42.5N) and H-CEMENT were used as binding components in the development of the concrete mixture designs. Both of these cements were produced by Považská cementáreň, a.s., Ladce. Attention was focused on testing the physical and mechanical properties of the developed concretes in various environments. An aqueous environment was selected as the first environment for the placement of test specimens (cubes with 150 mm edges and prisms with dimensions of 100 × 100 × 400 mm3) according to the ČSN EN 206-1 standard and the outdoor environment (August to October). The determination of the cube strength was made after 7, 28, and 90 days, the determination of the flexural and compressive strength was made at the end of the prisms, and the determination of the dynamic modulus of elasticity was made after 28 days on the prisms. The test results of the test specimens, which were placed in two environments, were compared and it was found that, after 90 days, the outdoor environment caused a decrease in the concrete’s strength characteristics when using Portland blended cement (CEM II/ B-S 42.5N) of about 8%; in contrast, when using H-CEMENT, the concrete’s strength increased by about 14%. The use of H-CEMENT and the addition of PUZZOLANIT in the amount of 30% in combination with CEM II/B-S 42.5N in the amount of 70% reduced the decrease in the strength of the concrete after 90 days by about 3%. The research results confirm the suitability of using H-CEMENT and the addition of PUZZOLANIT for the production of concrete based on steel slag (CSS) and air-cooled slag (ACBFS).

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