The correct choice of a stone aggregate for railway ballast is directly related to the stability, safety, efficiency, and maintenance costs track. must meet several criteria ensure it most appropriate material. Thus, present study aimed evaluate four distinct stones: two granites, diabase, basalt, all mined in eastern region state São Paulo, Brazil, regarding their applicability as ballast. Using Brazilian ASTM procedures samples, tests were conducted on 55 75-mm specimens, dry wet...

Civil construction is one of the most resource-consuming sectors in world. For this reason, last years have witnessed study reusing industrial residues building materials. The ornamental stone processing industry has a considerable environmental liability related to residue generation during cutting stages granite blocks. objective work analyze viability incorporating residues, up 100%, substitute sand coating mortars for construction. Mortars without residue, as control, and incorporated...

The use of activated alkali cements (AAC) as a replacement for Ordinary Portland cement (OPC) has become viable alternative. This is due to the advantages these materials, such possibility using wastes or industrial by-products in their composition, contributing environmental sustainability, addition mechanical properties' superior OPC. objective this work was evaluate mechanical, physical and durability properties an AAC based on blast furnace slag. production specimens carried out...

ABSTRACT Brazil is one of the largest producers pineapple in world, which, addition to bringing substantial benefits, contributes increasing waste generation stages processing, aiming at its consumption. The Brazilian environmental legislation has been increasingly more restrictive with respect disposal solid waste, whether domestic, industrial or agro-industrial, which stimulated studies related use these materials several matrices. This study aimed evaluate potentiality using natural fiber...

Mortars are cement-based materials used mainly to coat and settle construction blocks. In addition cement, their composition usually includes hydrated lime, sand, water. The lime is important improve the mortar workability. However, has a high commercial cost, its production causes emission of CO2, major responsible for global warming. Therefore, purpose this work was investigate possibility total or partial replacement in mortars by kaolinitic clay with ideal plasticity parameters. Clay...

Pathological manifestations in building systems is a complex problem from economical, cultural and environmental points of view, associated with the need durability analysis appears as relevant aspect to be considered regarding construction materials. Indeed, these materials present different degradation mechanisms, mainly joint participation cement. An example cementitious coating mortar, which has function protecting structure sealing building, recognized play fundamental role...

The recycling of industrial wastes such as those produced during processing ornamental stones is a relevant procedure to mitigate the possibility environmental pollution. In present work durability soil-cement blocks incorporated with an granite stone waste was investigated by means water immersion tests indicated Brazilian norm. Preliminarily, characterized its chemical composition, particle size and X-ray diffraction. incorporation carried out in mixture limestone, sand, cement. After...

Mortars with external coating are often subjected to situations of sudden degradation, such as heat stroke, salt attack in coastal environments, or rain. Therefore, the objective this work was evaluate results durability mortars proportion 1: 6: 1.5 (cement: hydrated lime: sand: water), containing incorporation 0, 1.5, 3.0 and 5% fiber açaí treated NaOH solution. The main importance is improve understanding cementitious natural fibers, especially açai fiber. After characterizing fibers using...

Graphene-related materials (GRM) show great potential as reinforcement in polymeric matrices, offering enhanced physicochemical and mechanical properties. In the aerospace sector, reinforced composites are increasingly used for their superior attributes design flexibility. Incorporating graphene nanoplatelets (GNP) into epoxy resin (ER) is a promising approach to enhance resin’s fracture toughness. The effectiveness of these nanocomposites depends heavily on dispersion nanoparticles within...

This study investigated, on a laboratory scale, the effect of durability incorporation ornamental stone waste in production red ceramic parts order to improve material properties and durability. To reach this objective, material, up 10% by mass, was introduced mass. Several other techniques were employed, including X-ray fluorescence chemical analysis, differential thermal diffraction analysis. The samples, pressed dimensions 11.0×2.5×1.0 cm with 8% humidity, oven dried sintered at 750°C,...

This work aims to identify the effects of replacing lime finely ground kaolinitic clay (GC) in mortars for coating walls and ceilings, evaluating water retention, calorimetry, XRD, mechanical resistance, absorption void index, comparing these properties with a mortar lime, called reference (RM), one addition commercial (CC) sold at local trade. The justificative this is due fact that empirically incorporated into mortars, as substitute order improve its workability. However, replacements...

The industrial production of lime generates greenhouse gases, which contributes to increase the global warming. Therefore, present study evaluated feasibility replacing by ornamental rock waste (ORW) as a by-product related stone industry, and developed cost-effective mortars. These new low-costing mortars are intended fresh fluid paste coatings be applied on walls mechanized projection technique. was collected from marble granite industry ground stone. It finely crushed before mixing with...

The technological performance and environmental advantages of replacing sand by ornamental stone processing waste (OSPW) in the production mortars for civil construction were studied. Technological properties associated with standard consistency index, squeeze flow bulk densities as well determination water retention calorimetry analysis evaluated mortars’ fresh state, whereas capillarity tests mechanical resistance flexural compression determined hardened state incorporated 10, 30 60 wt.%...

In the present work, statistical dispersion of mortar compressive strength as a function geometric parameters specimens well effect workability difference on was investigated. For this purpose, were prepared for six types mortars: two conventional mortars in proportions 1 : 6 and 2 9 cement, hydrated lime, sand, respectively, with clay replacing marble waste place lime. The results confirm between found geometries due to differences heights molding layers show that modifies resistance...