Search

ABSTRACT In the original paper, the simple power function used correlates carbonation rate with air permeability in carbonated concrete rather than in non-carbonated concrete. However, the reported air permeability tests [...]

The production of low cost and durable dry-cast concrete (DCC) represents an important industry for developing countries. DCC can have more environmental benefits if designed with alternative supplementary cementitious materials (ASCM) since its strength is not the main concern. This paper presents a laboratory optimization of pulp and paper biomass-fly ash (BFA) as ASCM and biomass-bottom ash (BBA) as an alternative sand, and combinations of both for DCC production. The BFA was used to replace up to 30% of cement and the BBA was employed to replace up to 80% of the sand. All DCC mixtures were characterized based on the fresh (compactness), mechanical (compressive and splitting-tensile strength), and transport (water absorption, air voids, and electrical resistivity) properties up to 91 days. The DCC mixtures made with 5%, 10%, or 15% BFA and 25% of BBA can reach a compactness index of 99% with a compaction work lower than specified by the Standards. The use of the BFA and BBA lead to a small decrease of the compressive strength, however they can exhibit very low permeability and water absorption values, lower than required by the specifications (close to 5%). Those results demonstrate the feasibility of using BFA or BBA in the production of DCC, which significantly contributes to the sustainability of the pulp and paper and concrete industries. Keywords: Biomass-bottom ash (BBA) Biomass-fly ash (BFA) Dry-cast concrete (DCC) Intensive Compaction Tester (ICT) Laboratory optimization Precast concrete pavers (PCP), 1. Introduction A dry-cast concrete (DCC) can be defined as a zero-slump concrete mixture with just enough water to initiate cement hydration with water-to-binder ratio (w/b) within the range of [...]

ABSTRACT In this paper carbamide as the fertilizer was added into planting concrete. As carbonic acid was produced during carbamide hydrolysis the fluidity and setting time of sulphoaluminate cement (SAC) [...]

ABSTRACT The self-healing behavior of a series of pre-cracked engineered cementitious composites (ECC) incorporating superabsorbent polymers (SAP) with relative low crack width is investigated in this paper, focusing on water [...]

ABSTRACT Although an earlier developed numerical methodology for permeability estimation of cement pastes can provide satisfactory results in comparison with experiments, it would be of engineering interest to find a [...]

ABSTRACT Durability of concrete depends largely on its water permeability, which is dominated by the composition and difficultly evaluated. This paper presents a three-dimensional (3D) FE algorithm to investigate the [...]

ABSTRACT This paper focuses on the measurement of the apparent vapour permeability of three different insulating materials: rockwool, polyurethane (PUR), and under-roof screen, by means of the cup method. The [...]

ABSTRACT This paper examines the mechanical strength and durability behavior of cementitious materials modified with two types of glass powders and a class F fly ash at various levels of [...]

ABSTRACT Used engine oil (UEO) is recognized as a hazardous waste produced during engine servicing. Its disposal in an environmentally friendly manner is a big challenge. This paper presents the [...]

ABSTRACT In 2014, this journal published the paper "Characterization of hygrothermal properties of wood-based products--Impact of moisture content and temperature", presenting among others the vapour permeability of wood-fibre insulation. This [...]

ABSTRACT Depending on its hydraulic activity, the use of Granulated Blast Furnace Slag (GBFS) in cementitious materials contributes to improve their durability performances. In this paper, a low reactive Granulated [...]

ABSTRACT In this paper, shredded waste tires are used as a substitution for gravel materials and their effect on stone column's behavior is investigated. An experimental study is carried out [...]

ABSTRACT This paper contains preliminary results of a study on the physical and radiological characterization of concrete samples containing NORM. The natural radionuclides content in term of [sup.226]Ra, [sup.228]Ra, [sup.232]Th, [...]

The authors thank Jiang and Gu for their interest in and subsequent discussion of our paper [1]. Jiang and Gu developed a new model for the assessment of concrete carbonation [...]

ABSTRACT This paper reports the results of a probabilistic analysis of Mode II fracture energy of concrete with different percentage replacements of natural fiver sand with crushed stone fine aggregate [...]

ABSTRACT This paper presents the results of a study of permeability and its influence on the durability of recycled concrete exposed to an aggressive environment. Recycled concretes with 20%, 50% [...]

ABSTRACT In this paper, 24 high performance concrete (HPC) mixtures with 0.25 and 0.40 water-to-binder ratios (w/ b) were designed and cast with binary and ternary blends of Portland cement [...]

ABSTRACT Ultra-high performance concrete (UHPC) as a novel concrete material is associated with very high strength and low permeability to aggressive environment. There have been many studies focusing on the [...]

ABSTRACT Using pervious concrete (PC) as a pavement material in low-volume road applications has gained great importance since its positive environmental benefits. The paper presented herein addresses the prospective use [...]

ABSTRACT Contamination of oil well cement slurries with mineral oil-based drilling fluids (MOBM) is considered to be a great challenge for cementing security and quality. In this paper, a surfactant [...]

ABSTRACT This paper represents the results of experimental investigations of impact strength and durability properties of concrete reinforced with post-consumer metalized plastic waste (MPW) generated from the discarded food packaging [...]

ABSTRACT The purpose of this paper is to explore the mixture design of normal strength concrete towards low shrinkage and low permeability using calcined zeolite as internal curing agent. Shrinkage, [...]

ABSTRACT As a kind of materials applied in road base course, porous concrete is required to have satisfactory strength, permeability, dynamic stability, scouring resistance and volume stability. In this paper, [...]

ABSTRACT This paper reports the influence of hot weather conditions and subsequent curing requirements on the strength and durability of multi-cementitious concrete. Five curing schemes were considered using persistent moist [...]

ABSTRACT This paper presents the multiple influences of internal curing (IC) and supplementary cementitious materials (SCM) on the shrinkage and microstructure development of reefs aggregate concrete (RAC). Different RAC are [...]

ABSTRACT This paper examines the mechanical and durability properties of concrete incorporated with treated recycled concrete aggregate (RCA) under different curing conditions. Three different curing regimes were applied, namely, continuous [...]

ABSTRACT There is a higher demand for the resistance of chloride ion of the buildings in coastal environment. In this paper, glass flake was used to improve the mechanical properties [...]

ABSTRACT The improvement reached on the compaction and bearing capacity of aeolian sand collected in Jeddah (Saudi Arabia) after its stabilization with Portland cement is evaluated, comparing the behavior for [...]

ABSTRACT Results of an experimental investigation on the compressive strength and permeation properties of fly ash based geopolymer concrete are presented in this paper. Fly ash was partially replaced with [...]

ABSTRACT By protecting concrete from penetration of aggressive chemicals, low permeability is one of the most important contributory factors to the concrete's durability. In this paper the effects of nano-Si[O.sub.2] [...]

ABSTRACT The paper presents the properties of low-calcium fly ash based geopolymer concrete in which fly ash was partially replaced (0, 10, 20 and 30%) with ordinary Portland cement (OPC). [...]

ABSTRACT The main objective of this paper is to develop asphalt concrete mixture and conduct performance tests for Asphalt Core Rockfill Dam (ACRD). Three conditions of mineral filler content have [...]

ABSTRACT Hydraulic pulse tests have been widely used to estimate the fluid transport properties of lowpermeability geomaterials. This paper applies transient pulse test to measure the surface permeability characteristics of [...]

ABSTRACT This paper characterizes the oxygen permeability of structural lightweight aggregate concrete (SLWAC). The influence of different parameters is analysed, namely water/binder (w/b) ratio, type of binder and aggregate, relative [...]

ABSTRACT There are variety of surface treatments used for concrete structures protection. This paper presents a review of the effect of surface treatments on mechanical properties and durability concrete, and [...]

The application of surface treatments in concrete has been widely investigated over the past decades. Surface treatment technology has become more important in concrete structures especially in preventing deterioration and damage when exposed to extremely aggressive environments, and in further extending service life. This paper presents comprehensive details of four types of concrete treatments, including surface coating, hydrophobic impregnation, pore blocking surface treatment and multifunctional surface treatment. Additionally, the knowledge of their interaction mechanisms with cementitious substrate is presented and discussed. The advantages and drawbacks of each treatment as well as the influencing factors on the protective effects of surface treatments on concrete, such as air permeability, bonding strength and cracking resistance, are also discussed. Despite decades of study, the mechanisms of many newly developed surface treatments remain poorly understood. A deeper understanding of the chemical and physical reaction mechanisms is therefore essential, especially at micro-scale levels. Keywords: Concrete Surface treatment Coating Air permeability Bonding strength, Contents 1. Introduction 2. Types and mechanisms of surface treatment 2.1. Surface coating 2.1.1. Traditional polymer coatings 2.1.2. Polymer nano-composite coatings 2.1.3. Cementitious coatings 2.2. Hydrophobic impregnation 2.3. Pore-blocking surface [...]

ABSTRACT This paper proposes a new method, namely, the surface water-spray method, for rapid and convenient evaluation of mortar permeability. In this method, after sprayed a certain amount of water [...]

ABSTRACT This paper investigates the effect of adding inorganic process additions (IPA) and increasing the insoluble residue (IR) on the strength and permeability characteristics of concrete. Also, the effect of [...]

ABSTRACT Worldwide use of ordinary cement concrete (OCC) faced with permeability problems causing significantly negative influence on construction and infrastructure, shortening the lifespan and increasing the related maintenance fee. To [...]

ABSTRACT Influence of bacteria on the properties of concrete made with rice husk ash (RHA) is presented in this paper. For this purpose, control concrete was designed to have 28-d [...]

ABSTRACT This paper presents a study on the use of PVA fibers and biocement to improve the engineering properties of Ottawa silica sand. The fibers used were at 0.0,0.4 and [...]

ABSTRACT Mortar creep takes place when the asphalt mortar continuously migrates downwards due to gravitational forces and can significantly disrupt air voids continuity in porous asphalt samples. This study was [...]

ABSTRACT This paper analyzes the self-healing properties of early-age concretes, engineered using a crystalline admixture (4% by the weight of cement), by measuring the permeability of cracked specimens and their [...]

ABSTRACT Porous asphalt (PA) has high drainage and noise-abrasion properties, however, its performance regarding rutting resistance, fatigue life, and moisture susceptibility is not as efficient as dens-graded mixes. This paper [...]

ABSTRACT The use of plant particles as aggregates in construction materials provide a very good hygric performance, and offers a real contribution to sustainable buildings. This paper focuses on the [...]

ABSTRACT The paper investigates the effects of three active mineral additions (AMA): microsilica (MS), nanosilica (NS) and metakaolin (MC), on the hardened properties, microstructure and mechanical performance of self compacting [...]

ABSTRACT Ferrochrome ash (FA) is a waste material obtained from the gas cleaning plant of a ferrochromium industry. This paper manifests the results of experimental investigations carried out to study [...]

ABSTRACT This paper presents a study for utilizing cement-bypass dust; an industrial solid waste that poses a great threat to the environment, to produce a low permeability cutoff wall. The [...]

ABSTRACT In this paper, properties of pervious concrete made with air-cooling electric arc furnace slag (EAFS) as aggregates are investigated. Test results showed that under the same condition, pervious concrete [...]

ABSTRACT This paper analyses the behaviour of cement mortars with addition of grinded fine sanitary ware (GSWF) aggregates, in percentages of 0%, 10%, 15% and 20% of the natural aggregates' [...]