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  • 1
    Online Resource
    Online Resource
    Cement-Based Materials Enhanced Durability from Opuntia Ficus Indica Mucilage Additions
    American Concrete Institute ; 2015
    In:  ACI Materials Journal Vol. 112, No. 1 ( 2015-02)
    Details
    In: ACI Materials Journal, American Concrete Institute, Vol. 112, No. 1 ( 2015-02)
    Type of Medium: Online Resource
    ISSN: 0889-325X
    URL: Article
    DOI: 10.14359/51687225
    Language: English
    Publisher: American Concrete Institute
    Publication Date: 2015
    detail.hit.zdb_id: 622967-0
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  • 2
    Online Resource
    Online Resource
    Proposal for a fiber cement panel with the addition of sugarcane bagasse
    ECORFAN ; 2022
    In:  Revista de Ingeniería Civil
    Details
    In: Revista de Ingeniería Civil, ECORFAN
    Abstract: The objective of the study is to propose a fiber cement panel based on sugarcane bagasse that complies with the basic requirements for non-compressed fiber cement, without using special equipment for its manufacture, reducing the processes by half without compromising the quality of the product. No crusher, kiln, hydraulic press or vacuum pump were used to produce the panels; water was used to clean the fibers and sodium silicate was used as a mineralizing agent; results were compared with NMX standards for structural mortars and fiber cement slabs together with manufacturing processes from previous research on natural fibers to obtain a methodology that optimizes the process. It is demonstrated that it is feasible to produce fiber cement panels that comply with the minimum regulatory requirements by reducing processes, without damaging the physical-mechanical values of the fiber cement. The best performance results show a MOR of 6.70 MPa and a density of 1560 kg⁄m^3 for a panel with 6% cane bagasse added to the dry mass of cement, a water/cement ratio of 0.95 by volume and sand/cement of 2.5 by mass. Opportunities are generated to experiment with counterpart fibers based on the tools, processes and recommendations of the project.
    Type of Medium: Online Resource
    ISSN: 2523-2428
    URL: Journal
    URL: Article
    DOI: 10.35429/JCE
    DOI: 10.35429/JCE.2022.16.6.46.53
    Language: English
    Publisher: ECORFAN
    Publication Date: 2022
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  • 3
    Online Resource
    Online Resource
    The inhibitive properties of Nopal slime on the corrosion of steel in chloride-contaminated mortar
    Emerald ; 2016
    In:  Anti-Corrosion Methods and Materials Vol. 63, No. 1 ( 2016-1-4), p. 65-71
    Details
    In: Anti-Corrosion Methods and Materials, Emerald, Vol. 63, No. 1 ( 2016-1-4), p. 65-71
    Abstract: – The purpose of this paper is to determine if a type of cactus mucilage, Opuntia ficus-indica (OFI), may act as a corrosion inhibitor for carbon steel in cement-based materials (mortar) exposed to chloride-laden environment. Design/methodology/approach – Mortar prisms, reinforced with carbon steel rods, were immersed in sodium chloride (NaCl) solution for five wet – dry cycles. The experimentation included electrochemical monitoring (corrosion potential, Ecorr, and polarization resistance, Rp) of carbon steel during the time of exposure until corrosion-induced cracking appeared at the mortar surface. Crack survey on the mortar prisms was performed. Carbon steel rods were retrieved from the mortar after crack survey and steel mass loss at the end of the experimental period was estimated. A comparison between the different mixtures was also performed. Findings – OFI mucilage did perform as a corrosion inhibitor of steel in chloride contaminated mortar. Research limitations/implications – The experimental program needs to be corroborated in concrete specimens with typical dimensions. The surface oxide/hydroxide formation of the carbon steel in contact with the OFI mucilage is still unknown; thus, electrochemical impedance spectroscopy (EIS) and X-ray diffraction (XRD) analyses are needed. Practical implications – OFI mucilage is a suitable natural product that can be used to increase durability of concrete structures not only in countries where OFI cactus is produced, but also in many other countries where this plant is considered a plague. Originality/value – The new information obtained from this paper is the innovative use of a by-product of this cactus plant for construction industry applications.
    Type of Medium: Online Resource
    ISSN: 0003-5599
    URL: Article
    DOI: 10.1108/ACMM-05-2014-1381
    Language: English
    Publisher: Emerald
    Publication Date: 2016
    detail.hit.zdb_id: 1477132-9
    detail.hit.zdb_id: 2419228-4
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  • 4
    Online Resource
    Online Resource
    Prediction of the Static Modulus of Elasticity Using Four non Destructive Testing
    Pontificia Universidad Catolica de Chile ; 2014
    In:  Revista de la construcción Vol. 13, No. 1 ( 2014-04), p. 33-40
    Details
    In: Revista de la construcción, Pontificia Universidad Catolica de Chile, Vol. 13, No. 1 ( 2014-04), p. 33-40
    Type of Medium: Online Resource
    ISSN: 0718-915X
    URL: Article
    DOI: 10.4067/S0718-915X2014000100004
    Language: English
    Publisher: Pontificia Universidad Catolica de Chile
    Publication Date: 2014
    detail.hit.zdb_id: 2573415-5
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  • 5
    Online Resource
    Online Resource
    Use of Audiovisual Methods and Documentary Film for the Preservation and Reappraisal of the Vernacular Architectural Heritage of the State of Michoacan, Mexico
    MDPI AG ; 2023
    In:  Heritage Vol. 6, No. 2 ( 2023-02-18), p. 2101-2125
    Details
    In: Heritage, MDPI AG, Vol. 6, No. 2 ( 2023-02-18), p. 2101-2125
    Abstract: The State of Michoacan has a wide and rich architectural heritage which is represented by different vernacular typologies which employ different materials and techniques according to the local resources. However, this wide knowledge and cultural heritage are disappearing, with several monuments and buildings being abandoned due to new dynamics and social changes. The traditional techniques have been substituted for modern and industrial construction systems since they are associated with obsolete ways of life. Through international cooperation for development and research projects, many activities were carried out to analyze the durability of local materials and vernacular constructions of the state. The main ones included the architectural survey and inspection of these buildings, photographic and drone surveys, characterization in the laboratory and oral interviews with local users. During the field work, these interviews with the local population, the creation of multimedia content and the use of audiovisual methods had crucial importance in the documentation of this local knowledge and culture, being great methods for scientific communication and dissemination. The main product is the documentary Xirangua, which means ‘roots’ in the Purépecha language, the main indigenous ethnicity in the state. This documentary explores the traditional architecture and construction of Michoacan, showing the reality within the loss of this vernacular heritage and portraying the importance of its conservation through the perspective of the local population, users and artisans. The use of these audiovisual techniques has demonstrated to be a suitable option to promote and preserve cultural heritage and educate, include the local actors in the process, and make the general public aware of the current issues, with this being one of the first works which explores this approach.
    Type of Medium: Online Resource
    ISSN: 2571-9408
    URL: Article
    DOI: 10.3390/heritage6020113
    Language: English
    Publisher: MDPI AG
    Publication Date: 2023
    detail.hit.zdb_id: 2934573-X
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  • 6
    Online Resource
    Online Resource
    Environmental Decay of Ignimbrite Patrimonial Monuments in the Dry, Urban, and Non-Industrial Atmosphere of Morelia (México)
    MDPI AG ; 2023
    In:  Heritage Vol. 6, No. 3 ( 2023-03-15), p. 3137-3158
    Details
    In: Heritage, MDPI AG, Vol. 6, No. 3 ( 2023-03-15), p. 3137-3158
    Abstract: Damage to the rocks of historic built heritage needs to be addressed to facilitate their conservation and restoration; the most serious damage is caused by environmental conditions and human activities. Buildings constructed with ignimbrite blocks bonded with lime mortar in Morelia, México, a UNESCO World Heritage site, were studied. The damage mainly occurs in the facades, on the surfaces of the rocks and in the mortar of the union exposed to climatic factors such as sun, rain, wind, and temperature changes, due to the actions of humans and vehicles emitting polluting gases; and due to pigeon excrement. This has caused the formation of patinas and flora, reduced the mechanical strength and exfoliation, decreased the density and cohesion in the mortar with rocks, and led to friction damage caused by people. In the facades of five buildings, the mechanical resistance and microstructural characteristics were indirectly determined by XRD, XRF, and SEM. The results were related to the climate, humans, and vehicular pollutant emissions. The damage was due to the environment, the influencing geographic orientation, and prevailing winds, rising capillary water on the facades, pigeon droppings, vehicular pollutant gases, and humans. Potential banks of healthy quarries were analyzed for use in the conservation and restoration of damaged monuments.
    Type of Medium: Online Resource
    ISSN: 2571-9408
    URL: Article
    DOI: 10.3390/heritage6030167
    Language: English
    Publisher: MDPI AG
    Publication Date: 2023
    detail.hit.zdb_id: 2934573-X
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  • 7
    Online Resource
    Online Resource
    Physical and Mechanical Characterization of Lime Pastes and Mortars for Use in Restoration
    MDPI AG ; 2023
    In:  Heritage Vol. 6, No. 3 ( 2023-02-28), p. 2582-2600
    Details
    In: Heritage, MDPI AG, Vol. 6, No. 3 ( 2023-02-28), p. 2582-2600
    Abstract: Slaked lime is traditionally a suitable material for use in construction activities in historic and traditional buildings whose constitutive characteristics demand compatible and appropriate material solutions. Therefore, knowing the physical and mechanical characterization of lime pastes and mortars for use in restoration is considered an important step in the process of scientific development of a material that, in the Mexican case, has lacked scientific rigor in its production, use and commercialization. With this in mind, the present article aims to investigate the characteristics of lime pastes and mortars that have been used in the traditional way and the new limes that exist in the market, offering suitable options for restoration, for which an integrated methodology was used consisting of physical tests such as surface area, electrical resistivity, pulse velocity, colorimetry, and mechanical tests such as compressive strength, giving as a result that “traditional slaked” lime is more likely to deteriorate than powdered lime, which leads us to conclude that powdered hydrated lime has optimal characteristics for restoration activities.
    Type of Medium: Online Resource
    ISSN: 2571-9408
    URL: Article
    DOI: 10.3390/heritage6030136
    Language: English
    Publisher: MDPI AG
    Publication Date: 2023
    detail.hit.zdb_id: 2934573-X
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  • 8
    Online Resource
    Online Resource
    Reinforced Concrete Structure Performance in Marine Structures: Analyzing Durability Indexes to Obtain More Accurate Corrosion Initiation Time Predictions
    MDPI AG ; 2021
    In:  Materials Vol. 14, No. 24 ( 2021-12-12), p. 7662-
    Details
    In: Materials, MDPI AG, Vol. 14, No. 24 ( 2021-12-12), p. 7662-
    Abstract: This paper presents a comparison of six index properties collected during durability inspections of five Mexican seaports. Typical durability indicators such as compressive strength, saturated electrical resistivity, ultrasonic pulse velocity, percent total void content, capillary porosity, and chloride concentration profiles were analyzed to obtain empirical correlations with the non-steady-state chloride diffusion coefficient. These indices were compared to determine correlation coefficients that are the most important for obtaining better corrosion initiation forecasting. Two models of corrosion initiation time (ti) were used: Fick’s second law of diffusion and the reported UNE-83994-2 (Spanish Association for Standardization, UNE) in which electrical resistivity was used to calculate concrete service life. The data from both models were cleaned using correlated variables, and the initial variables were compared with ti. The main result achieved was the verification of the feasibility of using correlations of variables to clean unnecessary data in order to calculate ti. Additionally, electrical resistivity was identified as one of the main durability indexes for in-service concrete structures exposed to marine environments. This is important because electrical resistivity is a non-destructive and reliable test that can be measured both in the laboratory and in the field very easily.
    Type of Medium: Online Resource
    ISSN: 1996-1944
    URL: Article
    DOI: 10.3390/ma14247662
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2487261-1
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  • 9
    Online Resource
    Online Resource
    Characterization of Adobe Blocks: Point-Load Assessment as a Complementary Study of Damaged Buildings and Samples
    MDPI AG ; 2021
    In:  Heritage Vol. 4, No. 2 ( 2021-05-20), p. 864-888
    Details
    In: Heritage, MDPI AG, Vol. 4, No. 2 ( 2021-05-20), p. 864-888
    Abstract: Adobe masonry is one of the oldest construction systems still in use today, Mexico has an enormous cultural heritage with traditional adobe houses being very representative of the rural communities and their culture. The 2017 Puebla Earthquake on September 19th struck the country causing the loss, destruction, and damage of historic buildings in several Mexican states, with the traditional earthen dwellings being the most vulnerable structures to these events. The fast abandonment of the local materials and techniques entails further research regarding the characterization of these construction systems, therefore, reconstruction efforts first require the recovery of the construction technique. After the seismic events, adobe samples of the remaining adobe structures of Jojutla de Juarez were collected. This population was one of the most affected in all the country, and, because of the major losses suffered, the study was conducted to determine the material properties of the dwellings’ adobe shards and natural quarry clays of the region. The characterization included destructive and non-destructive tests, mineralogical and granulometry analyses, and composition of the adobe samples of the buildings, as well as the aggregates. As a novelty, the compressive strength of the pieces was tested by two methods: the traditional compression strength test and the point-load test, in order to obtain the indicative values and the correlation equations between both tests. From the formal analysis and the laboratory, it was observed that the adobes from Jojutla presented different compositions which combined with the building malpractices and alterations to the traditional systems caused unpredictable behavior during the earthquake. The conduction of point-load tests in situ, as a part of a complete characterization methodology, could be an alternative to study the mechanical properties of patrimonial or damaged building samples before its disappearance.
    Type of Medium: Online Resource
    ISSN: 2571-9408
    URL: Article
    DOI: 10.3390/heritage4020047
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2934573-X
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  • 10
    Online Resource
    Online Resource
    Predicting Concrete Compressive Strength and Modulus of Rupture Using Different NDT Techniques
    Hindawi Limited ; 2014
    In:  Advances in Materials Science and Engineering Vol. 2014 ( 2014), p. 1-15
    Details
    In: Advances in Materials Science and Engineering, Hindawi Limited, Vol. 2014 ( 2014), p. 1-15
    Abstract: Quality tests applied to hydraulic concrete such as compressive, tension, and bending strength are used to guarantee proper characteristics of materials. All these assessments are performed by destructive tests (DTs). The trend is to carry out quality analysis using nondestructive tests (NDTs) as has been widely used for decades. This paper proposes a framework for predicting concrete compressive strength and modulus of rupture by combining data from four NDTs: electrical resistivity, ultrasonic pulse velocity, resonant frequency, and hammer test rebound with DTs data. The model, determined from the multiple linear regression technique, produces accurate indicators predictions and categorizes the importance of each NDT estimate. However, the model is identified from all the possible linear combinations of the available NDT, and it was selected using a cross-validation technique. Furthermore, the generality of the model was assessed by comparing results from additional specimens fabricated afterwards.
    Type of Medium: Online Resource
    ISSN: 1687-8434 , 1687-8442
    URL: Article
    DOI: 10.1155/2014/742129
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2014
    detail.hit.zdb_id: 2501025-6
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