Search citation statements
Paper Sections
Citation Types
Year Published
Publication Types
Relationship
Authors
Journals
Cement stabilization improves physical and mechanical properties of geotechnical materials. However, numerous combinations of geotechnical materials and cement hinder to establish a pattern of mechanical behavior of cement-stabilized materials. Thus, this study aims to evaluate the mechanical behavior of soil-aggregate-cement mixtures (SAC) using high early-strength cement (HE), to contribute to dosage aspects and to ascertain their recommendation as base and/or subbase layers in heavy and very heavy volume roads. For this, SAC mixtures composed of different proportions of soil and aggregate (20:80 and 30:70) with 3, 5 and 7% of cement were produced and cured at different times (0, 7 and 28 days). Mechanical properties were assessed in terms of unconfined compressive strength (UCS), indirect tensile strength (ITS) and resilient modulus by repeated load triaxial test ( ) and by dynamic indirect tensile test ( ). A cement dosage study compared compressive and tensile strengths with acting stresses computed by mechanistic analysis of hypothetical pavements. This same procedure was also used for verifying the possibility of anticipating construction phases and reducing the traffic opening time, in this case a SAC mixture using Portland composite cement (PCC) was also evaluated. Results indicated that SAC-20:80 presented better mechanical behavior than SAC-30:70. Also, the cement content that led to the best mechanical behavior was 5%. All SAC mixtures with 5% HE had higher strength than the acting stresses interval computed for hypothetical pavements. SAC mixtures reached, at 7 and 3 days of curing, respectively, 80% and 60% of 28-days strength, which is the control parameter of Sao Paulo-DOT instructions for SAC. Findings indicated that, due to their good mechanical behavior, SAC mixtures are viable alternatives as layers in heavy and very heavy traffic pavements. Additionally, SAC’s high strengths at earlier curing times have shown their potential to reduce construction time.
Cement stabilization improves physical and mechanical properties of geotechnical materials. However, numerous combinations of geotechnical materials and cement hinder to establish a pattern of mechanical behavior of cement-stabilized materials. Thus, this study aims to evaluate the mechanical behavior of soil-aggregate-cement mixtures (SAC) using high early-strength cement (HE), to contribute to dosage aspects and to ascertain their recommendation as base and/or subbase layers in heavy and very heavy volume roads. For this, SAC mixtures composed of different proportions of soil and aggregate (20:80 and 30:70) with 3, 5 and 7% of cement were produced and cured at different times (0, 7 and 28 days). Mechanical properties were assessed in terms of unconfined compressive strength (UCS), indirect tensile strength (ITS) and resilient modulus by repeated load triaxial test ( ) and by dynamic indirect tensile test ( ). A cement dosage study compared compressive and tensile strengths with acting stresses computed by mechanistic analysis of hypothetical pavements. This same procedure was also used for verifying the possibility of anticipating construction phases and reducing the traffic opening time, in this case a SAC mixture using Portland composite cement (PCC) was also evaluated. Results indicated that SAC-20:80 presented better mechanical behavior than SAC-30:70. Also, the cement content that led to the best mechanical behavior was 5%. All SAC mixtures with 5% HE had higher strength than the acting stresses interval computed for hypothetical pavements. SAC mixtures reached, at 7 and 3 days of curing, respectively, 80% and 60% of 28-days strength, which is the control parameter of Sao Paulo-DOT instructions for SAC. Findings indicated that, due to their good mechanical behavior, SAC mixtures are viable alternatives as layers in heavy and very heavy traffic pavements. Additionally, SAC’s high strengths at earlier curing times have shown their potential to reduce construction time.
-This work aimed to evaluate the potential application of a stabilizer derived from the intimate mixture of powder electric arc furnace oxidizing slag and fly ash, aiming at the improvement of soil engineering properties for enforcement purposes on forest roads. This evaluation was undertaken by means of an experimental program of laboratory tests to classify soils and mixtures of these with the proposed stabilizer according to the MCT (Miniature, Compacted, Tropical) methodology. The proportions of waste mixtures were 10% and 20% of the total dry mass of soil-waste combinations and percentages of ground steel slag were 75%, 87.5% and 100% relative to total dry mass of waste mixtures. It was shown the potential to technically enable the use of steel waste in the composition of forest roads, emphasizing the relevance of the proposal in meeting the need of steel companies to confer a sustainable destination for the waste and the need of forest companies to meet, with low-cost materials, the significant demands of their unpaved road network.Keywords: Soil stabilization; Steel waste; Forest transportation. CLASSIFICAÇÃO MCT DE MISTURAS DE SOLO-ESCÓRIA DE ACIARIA-CINZA VOLANTE COMPACTADAS VISANDO A APLICAÇÃO EM ESTRADAS FLORESTAISRESUMO -Este trabalho visou avaliar o potencial de aplicação técnica de um estabilizante resultante da mistura íntima de pó de escória oxidante de aciaria elétrica moída e cinza volante, visando à melhoria das propriedades de engenharia de solos para fins de aplicação em estradas florestais. Essa avaliação foi empreendida por meio de um programa experimental de ensaios laboratoriais destinados a classificar os solos e as misturas destes com o estabilizante proposto segundo a metodologia MCT (Miniatura, Compactado, Tropical). As proporções das misturas dos resíduos foram de 10% e 20% da massa seca total das combinações solo-resíduos, e as porcentagens de escória de aciaria moída foram de 75%, 87,5% e 100% em relação à massa seca total das misturas dos resíduos. Para as particularidades da pesquisa e por meio da classificação MCT, foi possível demonstrar o potencial de viabilizar tecnicamente o aproveitamento de resíduos siderúrgicos na composição das vias de tráfego florestais, realçando a relevância da proposta no atendimento à necessidade de empresas siderúrgicas de conferirem uma destinação sustentável de seus resíduos e à necessidade das empresas florestais de suprirem, com materiais de baixo custo, as significativas demandas de sua malha viária não pavimentada.Palavras-chave: Estabilização de solos; Resíduos siderúrgicos; Transporte florestal. 912Revista Árvore, Viçosa-MG, v.40, n.5, p.911-919, 2016 PITANGA, H.N. et al.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
334 Leonard St
Brooklyn, NY 11211
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.