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  • 11
    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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  • 12
    Online Resource
    Online Resource
    Study of the physical-mechanical properties of igneous stones from Tlalpujahua Michoacan, Mexico
    IOP Publishing ; 2021
    In:  IOP Conference Series: Materials Science and Engineering Vol. 1150, No. 1 ( 2021-05-01), p. 012021-
    Details
    In: IOP Conference Series: Materials Science and Engineering, IOP Publishing, Vol. 1150, No. 1 ( 2021-05-01), p. 012021-
    Abstract: Research work was carried out on rocks obtained in the municipality of Tlalpujahua Michoacán, located in different quarries of stone material, classifying the name of the quarry with the name of the community where the stones are located: “El moral” stones of bronze (BR) and golden (D) color, “la américa” stones of gray (G) and pink (R) color, “llano grande” stones of dark brown (CO), reddish-brown (CR) and black (N) color. Physical and mechanical tests were carried out, evaluating the percentage of moisture absorption, density, and absolute density. To evaluate the mechanical properties, the following tests were performed: uniaxial compressive strength ( UCS ), and static flexural test (modulus of rupture). The comparison of the different physical-mechanical tests allows estimating their behavior as a structural and restoration element. The correlation obtained to estimate the UCS has an acceptable correlation coefficient.
    Type of Medium: Online Resource
    ISSN: 1757-8981 , 1757-899X
    URL: Article
    DOI: 10.1088/1757-899X/1150/1/012021
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 2567001-3
    detail.hit.zdb_id: 2506501-4
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  • 13
    Online Resource
    Online Resource
    Measurement of CO2 Emissions by the Operation of Freight Transport in Mexican Road Corridors
    MDPI AG ; 2023
    In:  Applied Sciences Vol. 13, No. 20 ( 2023-10-17), p. 11391-
    Details
    In: Applied Sciences, MDPI AG, Vol. 13, No. 20 ( 2023-10-17), p. 11391-
    Abstract: The freight transport industry in Mexico has grown significantly since the establishment of trade agreements in North America, which has brought significant environmental consequences to the main transport corridors. This paper proposes a methodology for the estimation of emissions for freight vehicles on road transportation corridors. The variables included in this analysis allow adequate characterization of the conditions of the vehicle fleet, the geometry and the quality of the road, the environment, and the average annual daily traffic (AADT) of heavy vehicles. The results were structured to show two indicators, the amount of CO2 emissions per kilometer and the amount of emissions per tonne transported. These results will allow establishing a baseline of CO2 emissions through which we can implement actions in the road transport sector to reduce greenhouse gases (GHG) to mitigate climate change and develop parameter values for use in Cost Benefit Analysis. The indicators can also be applied to geospatial modeling of emissions in road transport corridors and forecast its growth.
    Type of Medium: Online Resource
    ISSN: 2076-3417
    URL: Article
    DOI: 10.3390/app132011391
    Language: English
    Publisher: MDPI AG
    Publication Date: 2023
    detail.hit.zdb_id: 2704225-X
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