40 documents found, page 1 of 4
Evaluation of the Fresh Properties of Cement Pastes: Part I—Response Models App...
Maia, LinoThe workability of cement-based materials is one of the features that makes these con struction materials the most used worldwide. Measuring and understanding how cement-based constituent materials affect fresh properties depends on the experimental plans. The experimental plans deal with the constituent materials used, the tests carried out, and the run of experiments. Here, the fresh properties (workability) ...
BIM model to support O&M tasks
Carvalho, Ana Thereza; Calejo, Rui; Santos, José; Maia, Lino: Technological evolution and BIM have changed the design development process in the construction industry. The operation and maintenance (O&M) phase requires building information throughout its service life, which was previously paper based, making it difficult to carry out maintenance activities. BIM assists in the management, storage, and digital sharing of information generated. However, only part of the in...
Durability in alkaline-activated materials a review on the state of the art
Ventura, Sebastião; Maia, LinoThe present work on durability in materials obtained by alkaline activation (AAM), in state-of-the-art review format, is structured as follows. (I) -The concept of alkali activated materials-composition-performance; (II) - The prediction of the useful life of AAM-methodologies and planning; (III) - The durability and properties of Engineering-mechanical tests-standards of specifications and tests (IV)-Degradati...
Quartz Powder Valorisation in White Self-Compacting Concrete: Mortar Level Study
Matos, Ana Mafalda; Maia, Lino; Coutinho, Joana SousaQuartz powder (QP) from mining exploration has increased, and valorisation solutions are sought. QP incorporation in structural concrete is an exciting strategy for the growth and sustainable development of the concrete industry, waste management and environmental protection. This work addresses the valorisation of QP from a Portuguese company on powder-type self-compacting concrete for architectural and struct...
Proposal for the Expansion of the Light Rail Vehicle Network
Mendonça, Fernanda Calado; Neto, Alcebíades Silva de Carvalho; Silva, Cleiton Alexandre Costa Da; Maia, LinoThe objective of this study is to present a preliminary study to demonstrate the importance of expanding the Light Rail Vehicle (LRV) in the city of João Pessoa. This would ensure the best level of operational comfort, safety, social inclusion, and sustainability with the existing transport network in the city. The methodology used began with the collection of data provided by public agencies that regulate urba...
Durability of concrete with alkali-activated materials, a short literature review
Ventura, Sebastião; Maia, LinoThe alkali-activated materials are being understood as the best chance to replace the Portland cement to become the concrete industry greener in terms of CO2 emissions. However, these alternatives binders face challenges, among others related to durability. The present work regards to a short literature review about the durability in concrete produced with binders that are alkali-activated materials.The mechani...
Exploring Design Optimization of Self-Compacting Mortars with Response Surface ...
Rocha, Stéphanie; Ascensão, Guilherme; Maia, LinoThe ever-evolving construction sector demands technological developments to provide consumers with products that meet stringent technical, environmental, and economic requirements. Self-compacting cementitious mixtures have garnered significance in the construction market due to their enhanced compaction, workability, fluidity, and mechanical properties. This study aimed to harness the potential of statistical ...
Evaluation of recycled gravel in the concrete mixture for the surface layer of ...
Esperança, Akihito Boa; Jésena, Bernardo; Maia, LinoPaving with recycled aggregates has already been widely carried out in some countries where there is already consolidated knowledge on the subject. This work analyzes in the laboratory the physical and mechanical behavior aspects of recycled aggregate in concrete mixes for rigid pavements. After selective collection at a construction site, the waste undergoes a crushing process, subsequent to granulation and se...
Modelling and Predicting Self-Compacting High Early Age Strength Mortars Proper...
Cangussu, Nara; Matos, Ana Mafalda; Milheiro-Oliveira, Paula; Maia, LinoThe mixture design of cement-based materials can be complex due to the increasing num ber of constituent raw materials and multiple requirements in terms of engineering performance and economic and environmental efficiency. Designing experiments based on factorial plans has shown to be a powerful tool for predicting and optimising advanced cement-based materials, such as self-compacting high-early-strength ceme...
Optimization techniques for mortars with self-compacting characteristics throug...
Rocha, Stéphanie; Maia, LinoThe high demand for concrete in civil construction promotes investment by researchers and builders to find methodologies that improve performance, costs and reduced environmental degradation. What justifies the large consumption of concrete is the possibility of improving its characteristics according to use. Self compacting concrete offers a mixture with high flowability, compaction and good mechanical propert...