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Papers by Lino Maia

Research paper thumbnail of Particleboard panels made with sugarcane bagasse waste—an exploratory study

Environmental Science and Pollution Research

The reuse of natural fibers, in order to manufacture a new product, is already becoming popular d... more The reuse of natural fibers, in order to manufacture a new product, is already becoming popular due to the generation of a series of advantages in social areas. Sugarcane bagasse is a set of tangled fibers of cellulose, produced in large quantities due to increased acreage and industrialization of sugarcane resulting from public and private investments in production aimed for the alcohol industry. The aim of this study was to evaluate the feasibility of producing sheet timber manufacture from the sugarcane bagasse, analyzing mechanical strength properties. A form of metal sheet for the molding of 12 specimens based on sugarcane bagasse and industrialized resin was made. Soon after molding, specimens were submitted to a three-point bending test, with the aid of a press. The analysis of the results allowed to conclude that the tensile strength and the modulus of elasticity did not obtain the minimum values recommended by the standard. The tensile strength must be improved to allow panels to be useful for ordinary strength applications.

Research paper thumbnail of Influence of Shrinkage-Reducing Admixtures on Early-Age Properties of Cement Pastes

Journal of Advanced Concrete Technology, 2006

Research paper thumbnail of Numerical methods to predict human induced vibrations on low frequency stairs. Part 1: Literature review, modelling

Research paper thumbnail of Design of self-compacting high-performance concrete: Study of mortar phase

Construction and Building Materials

Research paper thumbnail of Effect of specimen geometry and specimen preparation on the concrete compressive strength test

Structural Engineering and Mechanics

Research paper thumbnail of Developing a Commercial Self-Compacting Concrete Without Limestone Filler and With Volcanic Aggregate Materials

Procedia Structural Integrity

Research paper thumbnail of Reinforcement Measures to Reduce the Human Induced Vibrations on Stair Steps – A Case Study

Procedia Structural Integrity

Research paper thumbnail of Low durability of concrete elements due to steel corrosion – cases wherein the steel reinforcing bars acted as an internal clock bomb

Procedia Structural Integrity

Research paper thumbnail of Modulus of elasticity of concretes produced with basaltic aggregate

Computers and Concrete, 2016

Basalt is a type of volcanic rocks, grey to black in colour, contains less than 20% quartz, 10% f... more Basalt is a type of volcanic rocks, grey to black in colour, contains less than 20% quartz, 10% feldspathoid, and at least 65% of the feldspar of its volume. Basalt is considered an igneous rock with fine grains due to the rapid cooling of lava. Basaltic rocks have been widely used as aggregate for various purposes. The study presented in this paper was carried out on basalts that are widespread in the Madeira Island of Portugal and that comprise the major source of local crushed rock aggregates. This paper discusses an experimental programme that was carried out to study the effects of basaltic aggregate on the compressive strength and modulus of elasticity of concrete. For this purpose, cylinder specimens with 150×300 mm dimensions and prism specimens with 150×150×375 mm dimensions were cast. The experimental programme was carried out with several concrete compositions belonging to strength classes C20/25, C25/30, C30/37, C40/50 and C60/75. The Eurocode 2 indicates the modulus of elasticity should be 20% higher when the aggregates are of basaltic origin, however results showed significant differences and a correction is proposed.

Research paper thumbnail of Modulus of Elasticity of Concrete Produced with Basaltic Aggregates

Research paper thumbnail of Betão Autocompactável de elevado efeito estético

Research paper thumbnail of BIM Methodology, a New Approach - Case Study of Structural Elements Creation

Procedia Engineering, 2015

Research paper thumbnail of Creep and shrinkage of high-strength self-compacting concrete: Experimental and analytical analysis

Magazine of Concrete Research

In the present paper, a numerical and experimental study about creep and shrinkage behavior of a ... more In the present paper, a numerical and experimental study about creep and shrinkage behavior of a high strength self-compacting concrete is performed. Two new creep and shrinkage prediction models based on the comprehensive analysis on the available models of both conventional concrete and self-compacting concrete are proposed for high strength self-compacting concrete structures. In order to evaluate the predictability of the proposed models, an experimental program was carried out. A concrete which develops 60 MPa within 24 h was used to obtain experimental results. Several specimens were loaded: (i) at different ages and (ii) with different stress-to-strength ratios. Deformation in non-loaded specimens was also measured to assess shrinkage. All specimens were kept under constant stress during at least 600 days in a climatic chamber with temperature and relative humidity of 208C and 50%, respectively. Results showed that the new models were able to predict deformations with good ac...

Research paper thumbnail of Particleboard panels made with sugarcane bagasse waste—an exploratory study

Environmental Science and Pollution Research

The reuse of natural fibers, in order to manufacture a new product, is already becoming popular d... more The reuse of natural fibers, in order to manufacture a new product, is already becoming popular due to the generation of a series of advantages in social areas. Sugarcane bagasse is a set of tangled fibers of cellulose, produced in large quantities due to increased acreage and industrialization of sugarcane resulting from public and private investments in production aimed for the alcohol industry. The aim of this study was to evaluate the feasibility of producing sheet timber manufacture from the sugarcane bagasse, analyzing mechanical strength properties. A form of metal sheet for the molding of 12 specimens based on sugarcane bagasse and industrialized resin was made. Soon after molding, specimens were submitted to a three-point bending test, with the aid of a press. The analysis of the results allowed to conclude that the tensile strength and the modulus of elasticity did not obtain the minimum values recommended by the standard. The tensile strength must be improved to allow panels to be useful for ordinary strength applications.

Research paper thumbnail of Influence of Shrinkage-Reducing Admixtures on Early-Age Properties of Cement Pastes

Journal of Advanced Concrete Technology, 2006

Research paper thumbnail of Numerical methods to predict human induced vibrations on low frequency stairs. Part 1: Literature review, modelling

Research paper thumbnail of Design of self-compacting high-performance concrete: Study of mortar phase

Construction and Building Materials

Research paper thumbnail of Effect of specimen geometry and specimen preparation on the concrete compressive strength test

Structural Engineering and Mechanics

Research paper thumbnail of Developing a Commercial Self-Compacting Concrete Without Limestone Filler and With Volcanic Aggregate Materials

Procedia Structural Integrity

Research paper thumbnail of Reinforcement Measures to Reduce the Human Induced Vibrations on Stair Steps – A Case Study

Procedia Structural Integrity

Research paper thumbnail of Low durability of concrete elements due to steel corrosion – cases wherein the steel reinforcing bars acted as an internal clock bomb

Procedia Structural Integrity

Research paper thumbnail of Modulus of elasticity of concretes produced with basaltic aggregate

Computers and Concrete, 2016

Basalt is a type of volcanic rocks, grey to black in colour, contains less than 20% quartz, 10% f... more Basalt is a type of volcanic rocks, grey to black in colour, contains less than 20% quartz, 10% feldspathoid, and at least 65% of the feldspar of its volume. Basalt is considered an igneous rock with fine grains due to the rapid cooling of lava. Basaltic rocks have been widely used as aggregate for various purposes. The study presented in this paper was carried out on basalts that are widespread in the Madeira Island of Portugal and that comprise the major source of local crushed rock aggregates. This paper discusses an experimental programme that was carried out to study the effects of basaltic aggregate on the compressive strength and modulus of elasticity of concrete. For this purpose, cylinder specimens with 150×300 mm dimensions and prism specimens with 150×150×375 mm dimensions were cast. The experimental programme was carried out with several concrete compositions belonging to strength classes C20/25, C25/30, C30/37, C40/50 and C60/75. The Eurocode 2 indicates the modulus of elasticity should be 20% higher when the aggregates are of basaltic origin, however results showed significant differences and a correction is proposed.

Research paper thumbnail of Modulus of Elasticity of Concrete Produced with Basaltic Aggregates

Research paper thumbnail of Betão Autocompactável de elevado efeito estético

Research paper thumbnail of BIM Methodology, a New Approach - Case Study of Structural Elements Creation

Procedia Engineering, 2015

Research paper thumbnail of Creep and shrinkage of high-strength self-compacting concrete: Experimental and analytical analysis

Magazine of Concrete Research

In the present paper, a numerical and experimental study about creep and shrinkage behavior of a ... more In the present paper, a numerical and experimental study about creep and shrinkage behavior of a high strength self-compacting concrete is performed. Two new creep and shrinkage prediction models based on the comprehensive analysis on the available models of both conventional concrete and self-compacting concrete are proposed for high strength self-compacting concrete structures. In order to evaluate the predictability of the proposed models, an experimental program was carried out. A concrete which develops 60 MPa within 24 h was used to obtain experimental results. Several specimens were loaded: (i) at different ages and (ii) with different stress-to-strength ratios. Deformation in non-loaded specimens was also measured to assess shrinkage. All specimens were kept under constant stress during at least 600 days in a climatic chamber with temperature and relative humidity of 208C and 50%, respectively. Results showed that the new models were able to predict deformations with good ac...

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