Hamid Maljaee- PhD
- Associate Researcher at University of Aveiro
Hamid Maljaee
- PhD
- Associate Researcher at University of Aveiro
About
22
Publications
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657
Citations
Introduction
Current institution
Additional affiliations
June 2019 - present
July 2018 - January 2019
March 2013 - December 2017
Publications
Publications (22)
The popularity of natural cement (Roman cement) in buildings from the late 19th and the beginning of the 20th century and the high diversity of characteristics of natural cement demand research of mortar and binders used in the buildings of this period in Portugal. Understanding the type of binder used in the historic buildings will help the projec...
With the availability of commercial Natural cements (NC) for the conservation purposes raises a fundamental question about the compatibility between historic and repair mortars. The properties of Natural cements are dependent on the geological location of the raw material extraction and also on the production parameters, both having an impact on th...
This study suggests a new application of biochar particles into the cementitious material as a sustainable solution to prevent depletion of virgin aggregates and increase of carbon footprint. Biochar from olive stone wastes (OSB) is suggested for production of lightweight mortar to replace 25%, 45% and 60% of coarse sand (%V) with biochar. Some exp...
Waste valorisation as secondary or alternative raw materials in several sectors products and processes has been an important way to implement a more sustainable and circular way to manage the efficient use of natural resources. This action contributes not only to save natural resources but also to prevent sending large amounts of wastes, some of th...
Incorporation of biochar in cementitious materials is a promising solution in the mitigation of environmental pollutants by partially cutting off the consumed ordinary Portland cement and reducing the amount of waste disposal in landfills. This work studied the partial replacement of cement by biochars having a different chemical composition and it...
Biopolymers are very favorable materials produced by living organisms, with interesting properties such as biodegradability, renewability, and biocompatibility. Biopolymers have been recently considered to compete with fossil-based polymeric materials, which rase several environmental concerns. Biobased plastics are receiving growing interest for m...
Increasing cement production in construction sector and waste generation in industrial sectors are of the major sources of CO2 emission. For decades, it has been the concern of environmentalists to convince constructors and researchers to find sustainable solutions targeting aforementioned problems. The attempts focused on identification of wastes...
Application of Fibre Reinforced Polymers (FRPs) as external reinforcement has been found as a promising technique for the strengthening of masonry structural members. Despite extensive studies focused on the short-term performance, the long-term durability of such systems still needs more attention. Long-term durability tests providing real environ...
Near Surface Mounted (NSM) reinforcement is an interesting technique for seismic strengthening of masonry and historical structures. Despite having several advantages compared to conventional techniques, little attention has been given to understanding the involved mechanisms (such as bond behavior) in the performance of masonry components strength...
Fiber reinforced polymers (FRPs) have been extensively used for externally bonded
reinforcement of masonry structures. Although the efficiency of these composites in improving the
seismic performance of masonry structures has been sufficiently investigated, their durability and
long-term performance still remain insufficiently studied.
This paper p...
This study presents an investigation addressing the effect of environmental conditions on the thermal properties of a cold curing epoxy resin used in repair and strengthening of masonry structures. The exposure conditions consist of laboratory indoor conditions (IC), long-term water immersion (WI), hygrothermal exposure (HG) and outdoor real exposu...
Textile Reinforced Mortars (TRMs) have received extensive attention for externally bonded reinforcement of historical and masonry structures. Despite this recent attention, the available information on the test methods and mechanical performance of TRMs at different scales are limited. Extensive experimental results are still necessary for developm...
Externally bonded reinforcement (EBR) of masonry structures with Fiber Reinforced Polymers (FRPs) has received extensive attention during the last years. Despite the vast literature on mechanics and short-term performance, the durability and long-term performance of these systems still remain insufficiently studied. Structures are subjected to hars...
Externally bonded strengthening of masonry structures using Fiber Reinforced Polymers (FRPs) has been accepted as a promising technique. Although the effectiveness of FRPs in improving the performance of masonry components has been extensively investigated, their long-term performance and durability remain poorly addressed. This paper, tackling one...
The use of Near Surface Mounted (NSM) Fiber Reinforced Polymers (FRPs) for strengthening masonry structures can be a suitable substitute for Externally Bonded Reinforcement (EBR) technique. NSM technique has many advantages such as larger bonded area, better anchorage capacity, higher resistance, higher percentage exploitation of the FRP and reduce...
Nowadays, there is an increasing interest in using fiber reinforced polymers (FRP) for strengthening masonry elements. It has been observed that these materials, when used for externally bonded reinforcement (EBR), improve the performance of masonry components. However, issues such as durability and long-term performance of strengthened elements ar...
Questions
Questions (2)
Hello everyone,
I have recently used cellulose ether, methylhydroxyethylcellulose, in the mortar for printing purpose. I am insisting use of this admixture in my mix because of its great benefits, but it makes the mortar very sticky such that it is not extrudable. I decrease the dose of CE to the lowest limit but still it is sticky. Does anyone know how this stickiness can be prevented?
Hi,
Can anyone help me to analyze this DSC curve (for epoxy resin), please?
I actually need to know what the first peak is, (which can be seen in most of my tests), as I know that the second peak can be attributed to the enthalpic relaxation peak. And also I have problem with drawing baseline here.
