Chemical and Mechanical Properties of 70-Year-Old Concrete

Ambroziak, Andrzej; Haustein, Elżbieta; Kondrat, Jarosław

doi:10.1061/(asce)mt.1943-5533.0002840

Cited by 15 publications

(17 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The strength results determined for the concrete cores f ck,is,cycl 100 according to standard EN 12504-1 [ 32 ] are identical to the cube strength of 15 × 15 × 15 cm concrete specimens, thus f ck,is,cube = f ck,is, cycl 100 = 20.5 ± 1 MPa. The mean compressive strength of old concrete cylindrical samples slightly exceeds the value presented by Ambroziak et al [ 30 ] (18.8 ± 0.7 MPa) in early investigations.…”

Section: Laboratory Test Results and Discussioncontrasting

confidence: 68%

“…Structural analysis was a part of an expert opinion, required to check whether the old arch bridge has an adequate bearing capacity face to today’s traffic loads, in order to extend its service life. The present paper supplements and extends the investigations performed by Ambroziak et al [ 30 ] on the design stage. In the present paper, new concrete samples taken from the old concrete arch bridge during its reconstruction were tested in a laboratory and the results of the tests on the original steel reinforcement are presented.…”

Section: Introductionsupporting

confidence: 86%

See 1 more Smart Citation

A 95-Year-Old Concrete Arch Bridge: From Materials Characterization to Structural Analysis

Ambroziak

Malinowski

2021

Materials

Self Cite

View full text Add to dashboard Cite

The structural analysis of a 95-year-old concrete arch bridge located in Jagodnik (Poland) is performed in this paper, in order to check its behavior under today’s traffic loads. The mechanical properties of both the concrete and the reinforcement are investigated by testing cores and bar stubs extracted from the bridge. Structural analysis confirms that the bridge meets today’s load requirements in terms of bearing capacity, serviceability state, and that the adopted structural improvements (a new deck slab on top of the existing structure and a layer of mortar to protect the surface of the old concrete) are effective. In this way, the 95-year-old arch bridge was given a new life. The structural improvements show how combining numerical modelling and laboratory tests can contribute to the preservation of an old—though fairly simple—and valuable structure, otherwise destined to demolition, with both environmental and economic benefits.

show abstract

Section: Laboratory Test Results and Discussioncontrasting

confidence: 68%

Section: Introductionsupporting

confidence: 86%

A 95-Year-Old Concrete Arch Bridge: From Materials Characterization to Structural Analysis

Ambroziak

Malinowski

2021

Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…The 95-year-old concrete also had frost resistance (after 50 freezer cycles, the compressive strength decreased only 5% to f 50 freezer cycles c,cycl 100 = 17.9 MPa). However, the compressive strength of old concrete construction sometimes varies and exhibits a wide range of compressive strengths [10]. Hellebois and Espion [3] investigated 107-year-old concrete samples taken from the Colo-Hugues viaduct, which was designed and built in 1904 in Belgium, and found different compressive strengths: 54.2 MPa for the slab, 33.3 MPa for beams, and 19.7 MPa for the column.…”

Section: Concrete Compressive Strength Frost Resistance and Modulusmentioning

confidence: 99%

“…The ASTM C469M standard [28] states that the ratio between the specimen length L and the dimension D should be greater than 1.50; thus, the concrete cores for the determination of the modulus of elasticity was taken as L/D = 1.5. In laboratory tests, the application of a greater diameter and/or greater length to core diameter ratio (e.g., L/D = 2 as in the ASTM C31 standard [29]) is often impossible for old concrete structures [10].…”

mentioning

confidence: 99%

Chemical, Physical, and Mechanical Properties of 95-Year-Old Concrete Built-In Arch Bridge

2020

Self Cite

View full text Add to dashboard Cite

This research aimed to determine the durability and strength of an old concrete built-in arch bridge based on selected mechanical, physical, and chemical properties of the concrete. The bridge was erected in 1925 and is located in Jagodnik (northern Poland). Cylindrical specimens were taken from the side ribs connected to the top plate using a concrete core borehole diamond drill machine. The properties of the old concrete were compared with the present and previous standard requirements and guidelines. The laboratory testing program consisted of the following set of tests: measurements of the depth of carbonated zone and dry density, water absorption tests, determination of concrete compressive strength and frost resistance, determination of modulus of elasticity, measurement of the pH value, determination of water-soluble chloride salt and sulfate ion content, and X-ray diffraction analyses. Large variations in the cylindrical compressive strength (14.9 to 22.0 MPa), modulus of elasticity (17,900 to 26,483 MPa), density (2064 to 2231 kg/m3), and water absorption (3.88 to 6.58%) were observed. In addition to the experiments, a brief literature survey relating to old concrete properties was also conducted. This paper can provide scientists, engineers, and designers an experimental basis in the field of old concrete built-in bridge construction.

show abstract

“…Factors characterising liquid concrete are different from those in a solid-state [ 5 , 6 ]. Hardened concrete has to achieve specified compressive strength class, density, resistance to water penetration, and others [ 7 ]. The ultimate durability of concrete depends to a large extent on the contractor that is responsible for the placement and curing process, whose activity is also described by normal provisions and good practices [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Concrete Compressive Strength under Changing Environmental Conditions during Placement Processes

Ambroziak

Ziółkowski

2020

Materials

Self Cite

View full text Add to dashboard Cite

The technological process of concrete production consists of several parts, including concrete mix design, concrete mix production, transportation of fresh concrete mix to a construction site, placement in concrete framework, and curing. Proper execution of these steps provides good quality concrete. Some factors can disturb the technological process, mainly temperature and excessive precipitation. Changing daily temperature and rainfall during fabrication, transportation, and placement can shape not only the properties of the concrete mix but also the compressive strength of hardened concrete. In this paper, we tried to answer the question of how temperature and precipitation affect concrete production. The scope of this study was to determine the change of compressive strength of the hardened concrete in a specific period for selected concrete mix recipes, taking into account changing daily temperature and precipitation magnitude. The investigated concrete mixes concrete compressive strength beyond that of the concrete grade, termed "concrete superstrength.” This concrete post limiting behaviour of concrete is also discussed.

show abstract

Chemical and Mechanical Properties of 70-Year-Old Concrete

Cited by 15 publications

References 5 publications

A 95-Year-Old Concrete Arch Bridge: From Materials Characterization to Structural Analysis

A 95-Year-Old Concrete Arch Bridge: From Materials Characterization to Structural Analysis

Chemical, Physical, and Mechanical Properties of 95-Year-Old Concrete Built-In Arch Bridge

Concrete Compressive Strength under Changing Environmental Conditions during Placement Processes

Contact Info

Product

Resources

About