Concrete spalling: Interaction between tensile behaviour and pore pressure during heating

Felicetti, Roberto; Monte, Francesco Lo

doi:10.1051/matecconf/20130603001

Cited by 14 publications

(12 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In order to minimize thermal stresses, the heating rate was rather small (0.5 • C/min). The maximum pressure occurred in a narrow thermal range (180-220 • C, [14]). …”

Section: Porosity Vapor Permeability and Pore Pressurementioning

confidence: 98%

“…Pore pressure was measured during the heating process (see Section 3.3), in order to identify a possible relationship between the spalling sensitivity (that is related to the maximum pore pressure) and either the concrete porosity or the concrete vapor permeability. A special experimental set-up was designed and built [14].…”

Section: Physical and Mechanical Characterizationmentioning

confidence: 99%

“…Pore pressure was measured on 100 mm-side cubes with the heating and measuring system developed in [14]. Four mixes were investigated (Mixes 70-S, 70-S-Pm 1, 70-S-Pm 2 and 95-S).…”

Section: Porosity Vapor Permeability and Pore Pressurementioning

confidence: 99%

See 2 more Smart Citations

Concrete spalling sensitivity versus microstructure: Preliminary results on the effect of polypropylene fibers

Rossino

Monte

Cangiano

et al. 2013

MATEC Web of Conferences

Self Cite

View full text Add to dashboard Cite

Abstract. The phisyco-mechanical processes triggering concrete explosive spalling are related to the heat-induced micro-and meso-structural changes. To have new information on concrete properties at the microstructural level, as well as on how concrete spalling sensitivity is affected by polypropylene and steel fibers, and by aggregate type, ordinary and high-performance concretes are investigated in this research project, after being heated to different temperatures. The focus is on the relationship among porosity, vapor permeability, pore pressure and microcracking inside the cementitious matrix. Polypropylene fibers are shown to increase the total porosity, to favor microcracking and to reduce significantly pore pressure, to the advantage of concrete resistance to explosive spalling, whose risk is markedly reduced -or even zeroed.

show abstract

“…In order to minimize thermal stresses, the heating rate was rather small (0.5 • C/min). The maximum pressure occurred in a narrow thermal range (180-220 • C, [14]). …”

Section: Porosity Vapor Permeability and Pore Pressurementioning

confidence: 98%

Section: Physical and Mechanical Characterizationmentioning

confidence: 99%

See 1 more Smart Citation

Concrete spalling sensitivity versus microstructure: Preliminary results on the effect of polypropylene fibers

Rossino

Monte

Cangiano

et al. 2013

MATEC Web of Conferences

Self Cite

View full text Add to dashboard Cite

show abstract

“…The heating is usually performed in an electronic furnace. The common heating rate for concrete characteristics testing is 0.5 °C/min [4] to 10 °C/min [5]. This slow heating is chosen to restrain the thermal gradients.…”

Section: Introductionmentioning

confidence: 99%

“…Specimens are dried slowly, therefore the pore pressure (caused by water evaporation) does not rise up to the high values and thus the thermal damages in the concrete are minimized. Avery high heating rate can cause cracking in the concrete due to the thermal stress [5].…”

Section: Introductionmentioning

confidence: 99%

Strength characteristics of concrete exposed to the elevated temperatures according to the temperature-time curve ISO 834

et al. 2017

View full text Add to dashboard Cite

Abstract. While exposed to high temperatures caused by fire, the concrete undergoes a sequence of physical and chemical structure changes causing a mechanical degradation. This paper concerns an experimental strength determination of a temperature stressed concrete. The concrete was temperature loaded according to temperature-time curve ISO 834 and left on a top temperature level for 60 minutes afterwards. This temperature heating rise is in accordance with a common fire expansion in a structure. The concrete panels sized 150 × 1300 × 2300 mm were temperature loaded up to 550, 600, 800 a 1000 °C in a horizontal position in gas furnace for fire testing of structure elements in research Centre AdMaS. The temperatures of the gas in the furnace and the panel was measured during the whole experiment by using the thermocouples. After the fire test, the specimens were drilled out using a 100 mm diameter core drill. The compressive strength and splitting tensile strength tests were made and the results were compared to the reference specimen's test results. The objective results of a commonly used strength class concrete loaded by elevated temperature corresponding to the real fire exposure differ common linear heat exposure test results and are considered being very valuable.

show abstract

Impact Behaviour of Alkali Activated Slag Concrete at Ambient and Elevated Temperatures

Soliman

Diab

2022

Lecture Notes in Civil Engineering

View full text Add to dashboard Cite

Concrete spalling: Interaction between tensile behaviour and pore pressure during heating

Cited by 14 publications

References 10 publications

Concrete spalling sensitivity versus microstructure: Preliminary results on the effect of polypropylene fibers

Concrete spalling sensitivity versus microstructure: Preliminary results on the effect of polypropylene fibers

Strength characteristics of concrete exposed to the elevated temperatures according to the temperature-time curve ISO 834

Impact Behaviour of Alkali Activated Slag Concrete at Ambient and Elevated Temperatures

Contact Info

Product

Resources

About