A systematic review is carried out to determine the influence of recycled aggregate on the properties of concrete designed for pedestrian pavers, selecting highly relevant investigations, filtering them by years, focus and results. Which contribute to make a comparison of results in the properties of resistance to compression and percentage of absorption of pavers subjected to different percentages of replacement of recycled aggregate in its structure, in order to determine the influence, they have on said properties. Through the analysis and synthesis of results, the influence of the recycled aggregate is validated, affecting the decrease in its resistance to compression and the increase in the percentage of absorption. However, taking into account the information presented and based on the statistics, it is valid to conclude that by replacing up to 25% of the coarse aggregate with recycled aggregate, an adequate mixture can be achieved, complying with the parameters estimated by NTP. 399,611 according to their properties. Likewise, it is valid to mention that, at a higher percentage of replacement, the properties vary unfavorably
In engineering focused on construction, the guarantee of a good concrete result depends on the technology used in its elaboration, among which great importance falls on the materials used such as coarse aggregates, either with an angular or rounded contour. To do this, after a systematic review, the results regarding the compressive strength obtained from concretes with different contours mentioned were analyzed. Concluding the evaluation, it is confirmed that the contour of the coarse aggregate does affect the firmness of the concrete, especially the rounded shape, which presented better effects than the corner stone in the tests studied.
The objective of this work is to carry out a m ix de sign for translucent concrete using aggregates that allow t h e passage of light, therefore, an analysis related to the translucent concrete mix design was carried out, in a time interval of 10 ye ars, to define what type of aggregates, additives and w/c ratio, are the ones that will provide the greatest benefit to the final product. For this, a mix design for translucent concret e was proposed, referring to ACI 211.1, since different aggregates such as tempered glass, quartz, white cement and also a plasticizing additive will be used to obtain an o pt im al de sign for translucent concrete. In addition, application ca ses with additive were carried out, in order to obtain di f ferent mix designs with the properties of translucency and re sistance to compression, with these designs it was concluded that quartz and Ottawa sand are the ag g rega t es t h a t m o st favor the passage of light, however, using glass at 40% a n d quartz at 60% in the mix design gives moderate translucency to the mix, finally it was defined that the possible applicat io ns of this type of concrete are given for glass block type partitions and false ceiling , that is, for non-bearing aest het ic structures..
The objective sought with this research is to be able to build a series of daily flows in the Pachachaca basin to the Santa Rosa hydrometric station for a period of 30 years (1990-2020). These have been generated using rainfall and average temperature data from the ERA5 climate grid product and the flow measurement records of the Santa Rosa station for the days between the years 2019 to 2020, using the GR4j method. The simulated downloads were evaluated using statistical techniques of efficiency and error. Satisfactory results were obtained, which are shown in the calibration and validation stage of the GR4j hydrological model, obtaining in the validation a linear equation equal to y=0.9367x + 7.421; where the variable "x" represents the average monthly flows generated with the model and the values of "y" the original average flows registered, with a coefficient R2=0.8814; which is not giving an efficiency value that is between 80% and 100%. Statistical evaluation also showed that the GR4j model performs very well despite using only four parameters. This finding indicates that the evaluated models can be integrated as an alternative for strengthening the daily hydrological forecast in the Antabamba river basin up to the Santa Rosa station.
The objective of this work is to determine a model for the implementation of an internal control system in SMEs in Peru, as well as the proposal based on research of tools for the conception of a flexible control system, an organizational order, management by processes and an information system as a basis for the implementation of internal control. Concluding that an internal control system born of its own management greatly benefits the organization and not only accounting management, but the entire production process of the company, by reducing risks and the reliability of information, taking decisions based on data, such as responsiveness, operational efficiency of collaborators, increasing reliability in relationships with stakeholders such as customers and suppliers, becoming an organization with greater competitiveness in the market.
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