DSpace Coleção:http://repositorio.ufc.br/handle/riufc/240052026-04-10T14:58:43Z2026-04-10T14:58:43ZPBQP-H em obras de pequeno porte: análise de percepção de gestores de pequenas construtoras cearensesCartaxo, Ana Beatriz Piohttp://repositorio.ufc.br/handle/riufc/847002026-02-10T22:54:52Z2026-01-01T00:00:00ZTítulo: PBQP-H em obras de pequeno porte: análise de percepção de gestores de pequenas construtoras cearenses
Autor(es): Cartaxo, Ana Beatriz Pio
Abstract: The Brazilian Program for Quality and Productivity in Housing (PBQP-H) was established to promote improvements in quality and productivity in the construction industry through process standardization and the adoption of quality management practices. In this context, this study aimed to analyze the perceptions of managers of small construction companies regarding PBQP-H in small construction projects. The research adopts a qualitative and descriptive approach and was developed through case studies conducted in five construction companies. Data was collected through semi-structured interviews with company managers, enabling an analysis of their perceptions, difficulties, and motivations related to certification. The results indicate that none of the analyzed companies currently holds a valid PBQP-H certification, although different levels of knowledge and interest in the program were observed. The main barriers to adopting PBQP-H are related to financial costs, the shortage of qualified labor, high workforce turnover, and the program’s operational and bureaucratic requirements. Despite these challenges, most managers acknowledge that certification can contribute to the standardization of construction processes, improved internal organization, enhanced final product quality, and strengthened market competitiveness. The findings suggest that the low adoption of PBQP-H in small construction projects is primarily associated with companies’ structural limitations and the absence of local market requirements, rather than with a lack of awareness of the certification’s benefits.
Tipo: TCC2026-01-01T00:00:00ZEfeito de ciclos de degradação físico-química na resistência mecânica em argamassas geopoliméricas reforçadas com fibras de poliésterLacerda, Maria Luisa Almeidahttp://repositorio.ufc.br/handle/riufc/846772026-02-10T13:12:57Z2026-01-01T00:00:00ZTítulo: Efeito de ciclos de degradação físico-química na resistência mecânica em argamassas geopoliméricas reforçadas com fibras de poliéster
Autor(es): Lacerda, Maria Luisa Almeida
Abstract: Currently, the cement industry is responsible for a significant amount of carbon dioxide (CO₂) emissions into the atmosphere due to the high demand for ordinary Portland cement (OPC). Its production makes use of clinker, thus causing the release of CO₂. A sustainable alternative to replace OPC is alkali-activated materials (AAMs), formed by the mixture of a solid precursor with an alkaline solution. Therefore, the present study aims to analyze the mechanical strength of geopolymer mortars reinforced with polyester fibers before and after immersion in aggressive solutions. Thus, six types of mixtures were produced by varying the contents of metakaolin and recycled glass powder for two fiber reinforcement contents, and through wetting and drying cycles, the mortars were immersed in solutions containing water(H₂O), sodium chloride (NaCl), and magnesium sulfate (MgSO₄). For the production of the mortars, an activating solution composed of sodium silicate(Na₂SiO₃) and sodium hydroxide (NaOH) with a concentration of 6 M was used, and an activator-to-precursor ratio fixed at 0.8; the binder-to-sand ratio was 1:2. The consistency index test was carried out to determine mortar workability using a flow table. For the hardened state, compressive strength tests were performed to analyze the compressive strength of the samples at 7 and 28 days, as well as flexural tensile strength tests at 28 days for prismatic specimens. The same compressive strength test was also performed for the samples after the degradation cycles in aggressive solutions. In the fresh-state results of the geopolymer mortars, the flow diameter tended to increase when the incorporated fiber content was lower, with 0.1% addition. Regarding compressive strength, samples with higher metakaolin content tended to present higher strength values, reaching 50.35 MPa at 7 days and 57.33 MPa at 28 days. The same behavior was observed for the analysis of flexural tensile strength values. In addition to these data, it was possible to analyze that the immersion of the samples in aggressive solutions caused the appearance of efflorescence on the specimens, with the presence of whitish stains and even salt formation on the surface of those immersed in MgSO₄. Compressive strength after the cycles showed strength gains for the samples immersed in magnesium sulfate and losses for those tested in sodium chloride.
Tipo: TCC2026-01-01T00:00:00ZDanos em edifícios decorrentes de falhas em fundações: uma revisão integrativaAlbuquerque, Francisco Gildezio Sousahttp://repositorio.ufc.br/handle/riufc/846692026-02-10T10:24:18Z2026-01-01T00:00:00ZTítulo: Danos em edifícios decorrentes de falhas em fundações: uma revisão integrativa
Autor(es): Albuquerque, Francisco Gildezio Sousa
Abstract: Foundations are fundamental components in the overall behavior of buildings, as they are responsible for properly transferring structural loads to the soil. Failures at this stage may lead to loss of functionality, durability, and structural safety, resulting in various types of damage. In this context, this Undergraduate Thesis aims to analyze building damages resulting from foundation failures through an integrative review of the scientific literature. The adopted methodology was based on a systematic protocol, which included the formulation of the research question using the PICo framework, definition of inclusion and exclusion criteria, searches in national and international databases, and critical analysis of the selected studies. After the selection process, 16 scientific articles published between 2020 and 2025 composed the final sample. The results indicated that building damages are closely associated with inadequate geotechnical investigations, construction failures, design errors, and unfavorable geotechnical conditions, highlighting differential settlement as the main mechanism responsible for the damages reported in the analyzed literature. The identified damages range from aesthetic and functional manifestations to severe structural impairments, including deep cracks, permanent deformations, torsion, significant tilting, and risk of partial or total collapse. Thus, it is concluded that reducing the occurrence of such damages depends on the adoption of an integrated technical approach, involving rigorous geotechnical investigations, well-developed foundation design, consideration of soil–structure interaction, and improved execution control, thereby ensuring higher levels of safety, performance, and service life of buildings.
Tipo: TCC2026-01-01T00:00:00ZCaracterização de massa de terra crua para extrusão em impressora 3DVieira, Francisco David Martinshttp://repositorio.ufc.br/handle/riufc/846352026-02-06T14:44:00Z2026-01-01T00:00:00ZTítulo: Caracterização de massa de terra crua para extrusão em impressora 3D
Autor(es): Vieira, Francisco David Martins
Abstract: 3D printing by raw earth extrusion for the construction industry is emerging as a technology with the potential to reduce environmental impacts by using natural materials and decreasing the consumption of industrialized inputs. Therefore, this study aims to characterize natural soils for the formulation of raw earth mixtures suitable for application in extrusion-based 3D printing
processes. The soils were collected in the city of Crateús, Ceará, Brazil, and analyzed individually and in combination at different proportions. Granulometric characterization tests and plasticity analyses were performed. The results revealed distinct behaviors between the analyzed soils. Soil
A exhibited a clayey character, with approximately 29.9% clay and 12.4% silt, a liquid limit of 42%, and a plasticity index of 16%. Soil B showed predominantly sandy behavior, with 48.7% sand, low fines content (8.4% clay and 7.6% silt), a liquid limit of 16%, and no plasticity. The combination of the two materials resulted in a mixture composed of 35% clayey soil and 65% sandy soil. The final mixture presented 45.3% sand, 18% clay, and 11.8% silt, with a liquid limit
of 25% and a plasticity index of 9%, values within the ranges recommended in the literature and compatible with extrusion process requirements. The consistency test of the mixture showed a spread diameter of 17.96 cm, placing the material within an intermediate consistency range and indicating a balance between deformability and dimensional stability. In the extrusion test, the
material enabled the formation of continuous filaments, with the best geometric performance observed using the 24 mm nozzle. Compressive strength tests yielded values of 1.62 MPa at 7 days and 1.83 MPa at 28 days, which is characteristic of raw earth-based materials that exhibit limited mechanical strength. The study contributes to the understanding of the use of natural soils in additive manufacturing, highlighting the potential of raw earth as a sustainable construction alternative and providing technical support for the development of mixtures suitable for this technology.
Tipo: TCC2026-01-01T00:00:00Z