A5027100408- Innovative concrete reinforcement materials
- Concrete and Cement Materials Research
- Asphalt Pavement Performance Evaluation
- Infrastructure Maintenance and Monitoring
- Recycled Aggregate Concrete Performance
- Innovations in Concrete and Construction Materials
- Concrete Properties and Behavior
- Recycling and utilization of industrial and municipal waste in materials production
- Advanced Fiber Optic Sensors
- Magnesium Oxide Properties and Applications
- Transport Systems and Technology
- Microbial Applications in Construction Materials
- Urban Heat Island Mitigation
- Natural Fiber Reinforced Composites
- Smart Materials for Construction
- Geophysical Methods and Applications
- Grouting, Rheology, and Soil Mechanics
- Concrete Corrosion and Durability
- Non-Destructive Testing Techniques
- Odor and Emission Control Technologies
- Surface Roughness and Optical Measurements
- Nuclear materials and radiation effects
- Urban Green Space and Health
- Sustainable Urban and Rural Development
- Ultrasonics and Acoustic Wave Propagation
Riga Technical University
2015-2025
University of Antwerp
2017-2024
Riga Technical College
2015
Abstract This recommendation is based on the results of an inter-laboratory study organised by RILEM technical committee TC 264-RAP "Asphalt Pavement Recycling"—Task Group 3 (TG3) focusing Asphalt Binder for Recycled Mixture. The TG3 aimed to evaluate effect a specific family materials known as asphalt recycling agent (ARA) aged binder under different configurations. Even though ageing irreversible phenomenon, effective ARA must have capability improve flexibility bituminous and their...
This state-of-the-art review was aimed to conduct a comprehensive literature survey summarize experiences of crumb rubber (CR) application in concrete within the last 30 years. It shows that certain gaps prevent obtaining coherent overview both mechanical behaviour and environmental impact (CRC) object stereotypes which use CR construction industry. Currently, four major barriers can be distinguished for successful industry: (1) cost recycling, (2) properties reduction, (3) insufficient...
Pavement design is essentially and usually a structural long-term evaluation process which needed to ensure that traffic loads are efficiently distributed at all levels of the total road structure. Furthermore, get complete analysis its durability behavior, monitoring should be facilitated, not only from top by falling weight deflectometer (FWD) or core drilling but preferably inside structure exactly same positions during long-time interval. Considering it very hard devise an efficient...
The negative environmental impacts associated with the usage of Portland cement (PC) in concrete induced intensive research into finding sustainable alternative mixes to obtain “green concrete”. Since principal aim developing such is reduce impact, it imperative conduct a comprehensive life cycle assessment (LCA). This paper examines three different types mixes, viz., alkali-activated (AAC) natural coarse aggregates, AAC recycled aggregates (RCA), and bacterial (BC). A detailed impact RCA,...
Nowadays, a vast number of concrete structures are approaching the end their expected service life. The need for maintenance and repair is high due to continued deterioration existing building inventory infrastructure, resulting in large near future. Reinforcement corrosion most important mechanism, causing (i) severe damage (cracking along reinforcement spalling cover concrete) (ii) loss steel section. Therefore, appropriate techniques main focus this review paper. With European transition...
Concrete, having evolved over the last 2000 years, is integral to modern infrastructure, with continuous innovations aiming address sustainability challenges. From Roman concrete mixes invention of Portland cement (PC), has meet growing infrastructure demands. As urbanization and energy consumption increase, construction industry focusing on high-performance materials, recycling, minimizing harmful substances. Research sustainable alternatives shows promising reductions in global warming...
A quick method to access the tensile strength of concrete is often required during surveys. However, it not always clear which most effective or whether a certain can be simplified adjusted. Recently, pull-off tests on floors and walls have become more common for measuring concrete, although results interpreted in different ways. This research compares types testing with standard splitting test, considered destructive. study revealed differences between test results. Among three methods,...
The paper focuses on the reuse of crushed asphalt (GA) as a partial replacement (up to 20%) natural aggregates for concrete manufacture. Addition GA produced positive effect workability loss. mixes, however, showed significant tendency bleed and segregate at highest percentage applied. led decrease compressive strength in (with respect that reference concrete) up 50% due weakness cement paste / recycled aggregate interface. To compensate this negative effect, reduction w/c concretes was...
The scientific community is shifting its focus towards construction materials with a low carbon footprint, such as alkali-activated concrete (AAC). present study conducts an environmental impact assessment using the cradle-to-grave approach to examine implications of three different types ambient-cured AACs varied combinations precursors. 28-day compressive strength values mixes used for comparing impacts vary from 35 55 MPa. Among these mixtures, one least chosen further inclusion fibers....
Quite often, concrete strength parameters must be determined in the shortest possible time. Due to strong correlation between concrete’s mechanical and acoustic properties, ultrasonic devices can used for this purpose. However, pulse velocity (UPV) is influenced by a variety of factors, including curing exploitation conditions concrete, presence reinforcement, other various physical factors. Ignoring these factors may contribute misinterpretation measurement data when determining concrete....
Bitumen is one of the most important materials used in roads. During asphalt pavement construction, workers can be affected by emissions, such as volatile organic compounds (VOCs), when bitumen heated. Therefore, it crucial to correctly identify and measure VOCs. This paper presents a novel, promising method determine VOC emissions. The proposed offers way standardize routine measurements on lab scale, enabling reliable comparison across types their modifications or additives. A...
In the present study, a new approach to installation of fiber Bragg grating (FBG) sensors in three asphalt pavement layers (the surface layer and both base layers) was implemented for first time Belgium. Fiber (FBGs) are diagnostic tools that accurately efficiently monitor situ structural behavior. However, nowadays, this technology is not commonly used due its application restrictions under service conditions. FBGs fragile break easily loading. Therefore, there need suitable protection FBG...
Moisture susceptibility is still one of the primary causes distress in flexible pavements, reducing pavements’ durability. A very large number tests are available to evaluate a binder aggregate combination. Tests can be conducted on asphalt mixture, either loose or compacted form, individual components an pavement. Apart from various mechanisms and models, fundamental concepts have been proposed calculate thermodynamic tendency combination adhere and/or debond under wet conditions. The aim...
The paper deals with the effectiveness of an innovative phosphonate-based superplasticizer (PNH) for ready mixed concrete. Concrete specimens were manufactured by considering a constant initial workability, equal to 220 mm slump at end mixing procedure. Workability was measured 0, 30, and 60 min evaluate workability retention performances superplasticizer. Compressive tests 1, 7, 28 days carried out influence on concrete setting hardening. mixes designed 13 different cements assess...
The drying shrinkage of alkali-activated concrete (AAC) is a very complex process, and it warrants long-term testing. present study was focused on the development prediction models for ambient-cured AAC. AAC with four distinct precursor combinations experimental validation investigation influence mix proportions were used. applied fly ash (FA) to ground granulated blast-furnace slag (GGBFS) ratio varied as 100:0, 70:30, 60:40, 50:50. Drying strains determined hardened paste, mortar,...
Waste glass is an endless issue for the majority of countries in world with a linear economy usage materials. Demolition waste counted as part total construction and demolition (CDW). Even today, there are some statistical problems quantification dividing it from CDW, since most do not provide such division types. The current review shows possible ways utilizing useful products industry. It elaborated using PRISMA@ methodology bibliometric qualitative methods to systematical overview...
The scope of the paper is to report an investigation on durability infrastructure concrete for roads and bridges by creating a size shape-designed pore systems in order improve it, especially terms freeze–thaw resistance. By means this experimental laboratory study, alternative usage air entrainment agents (AEA) infrastructures was found way using superabsorbent polymer materials (SAPs). effect addition SAPs different amounts types into fresh mix investigated, including: compressive strength...
Alkali-activated binders (AABs) offer the opportunity to upcycle a variety of residues into products that can have added value. Although AABs are reported superior high-temperature performance, their thermal behavior is heavily governed by microstructure. The present study, therefore, evaluates effect varying fly ash:slag ratios, activator modulus (Ms), and high temperatures on microstructure AAB using X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy...
Abstract New methods are proposed for the verification of presence superabsorbent polymers (SAP) in freshly mixed concrete and estimation SAP quantity. The general based on flushing with excess water. They allow separating light, water-sorbed hydrogel particles from mineral components fresh making these available further tests. Two types tests proposed: Test 1 serves a visual (qualitative test), while 2 enables quantifying mass collected as proxy their concentration (quantitative test)....
In Flanders, using Reclaimed Asphalt Pavement (RAP) is allowed in asphalt mixes for base layers. Primary economic and secondary laboratory-measured mechanical properties are given as justification higher amounts specific mixes. However, one should evaluate the performance of these on long-term by environmental impact production until end-of-life. this paper recommendations strategies RA, based current research, discussed a broader perspective such carbon-footprint tool warm-mix Flemish...
The paper deals with the effectiveness of blended phosphonate-based superplasticizers (PHN) for ready mixed concrete. Two phosphonates (PNH1 and PNH2) were added in different percentage to naphthalene sulphonate (NSF) or polycarboxylates (PCEs) based admixtures improve both compatibility cements workability retention performance obtained concrete mixtures was compared concretes manufactured pure NSF PCE admixtures. Concretes same initial (flow table > 580mm) produced at a temperature 20...
In this study, the feasibility of a natural peat fiber and finely ground powder as modifier for bitumen was investigated. Initially, as-received material characterized in detail: to various degrees, separated into fractions, gradation fraction well size fibers were determined. A possible solubility bitumen, moisture content, density both fractions evaluated, limited chemical characterization conducted. Secondly, rheological behavior when blended with evaluated. Additionally, asphalt study...