J. Benlloch

A Combined Use of GPR Data With Historical Archives for Identifying Pavement Construction Periods of Valencian Silos (16th Century, Spain)

This paper describes the combined use of ground penetrating radar (GPR) data with historical archives performed in the silo-yard of Valencia (Spain) to identify and map various pavement construction periods. The Valencian silos were constructed to house the underground grain storage of Valencia City. This architectural complex is composed of three buildings and a big square (silo-yard), under which 41 silos are placed. The construction of the silo-yard pavement extended for two centuries (16-18th century) following different construction systems. Historical archives confirmed seven pavement construction periods. However, archive data provided scant information on pavement layers and the construction periods. A GPR survey was carried out for pinpointing the seven pavement construction periods. A GSSI SIR-3000 equipment with a 400-MHz frequency antenna was used for collecting

Indirect methods of estimate striking period through the concrete strength evolution

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Métodos de cálculo indirectos del periodo de descimbrado a partir de la evolución de la resistencia del hormigón

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Ground-penetrating radar survey for subfloor mapping and analysis of structural damage in the Sagrado Corazón de Jesús Church, Spain

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DUCTILITY OF REINFORCED CONCRETE BEAMS STRENGTHENED WITH CFRP STRIPS AND FABRIC

profiles across the square (

Influence of moderate temperatures on the bond between carbon fibre reinforced polymer bars (CFRP) and concrete

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Permeabilidad, porosidad y resistencia a compresión de hormigones autocompactables

), reaching 1.5-m depth. In addition, a GPS survey was performed specifically for surface mapping the silo-yard in detail. The combined use of the GPR data (2-D reflection profiles, spectra, and amplitude slice maps) with the historical archives allowed identifying and delineating the different pavement construction periods on the silo-yard map in terms of materials and thicknesses. These results demonstrate GPR is a noninvasive and nondestructive technique for mapping soils and near surface horizons. Additionally, the combined use of the GPR data with the historical documentation makes this technique even more efficient for the comprehension of shallow ground layers, especially in cultural heritage studies.

Microconcrete with partial replacement of Portland cement by fly ash and hydrated lime addition

Resumen es: En este trabajo se propone un nuevo metodo de calculo del periodo de descimbrado de la estructura de hormigon armado que es una alternativa a los metodos...This paper proposes a new method of calculating the striking period of the reinforced concrete structure that is an alternative to current methods for calculating, direct and indirect, of the striking period (eg. resistance testing, adjustment methods to the current reality of concrete). At the same time adjusts or modify the calculating method of the striking period proposed by Benlloch (1996). For this, is done on the analysis of the evolution of the concrete characteristic tensile strength commonly used in building HA-30/B/20/ IIa and HA-25/B/20/IIa (categorized according to EHE-08). The data used are taken from a database composed of 67.785 compressive strength data, that through a statistician study and the equations specified by the Spanish Code on Structural Concrete of 2008 (EHE08), have obtained some equations and graphs to estimate the tensile strength evolution.

Understanding subterranean grain storage heritage in the Mediterranean region: The Valencian silos (Spain)

Resumen es: En este trabajo se propone un nuevo metodo de calculo del periodo de descimbrado de la estructura de hormigon armado que es una alternativa a los metodos...This paper proposes a new method of calculating the striking period of the reinforced concrete structure that is an alternative to current methods for calculating, direct and indirect, of the striking period (eg. resistance testing, adjustment methods to the current reality of concrete). At the same time adjusts or modify the calculating method of the striking period proposed by Benlloch (1996). For this, is done on the analysis of the evolution of the concrete characteristic tensile strength commonly used in building HA-30/B/20/ IIa and HA-25/B/20/IIa (categorized according to EHE-08). The data used are taken from a database composed of 67.785 compressive strength data, that through a statistician study and the equations specified by the Spanish Code on Structural Concrete of 2008 (EHE08), have obtained some equations and graphs to estimate the tensile strength evolution.