Sulfate Attack on Concrete - Chapter 0 docx

... 0 419–245 50 2 This edition published in the Taylor & Francis e-Library, 200 3. ISBN 0- 2 0 3-3 01 6 2-5 Master e-book ISBN ISBN 0- 2 0 3-3 422 4 -0 (Adobe eReader Format) (Print Edition) © 200 2 Jan Skalny, Jacques ... subjected to external sulfate attack 5.3 Consequences of sulfate attack on the microstructure of concrete 5.4Consequences of sulfate attac...

Ngày tải lên: 08/08/2014, 10:23

... normal-weight aggregate concrete) 1 Negligible 0. 00 0. 10 0–1 50 – – Moderate 2 0. 10 0. 20 1 50 1, 500 II, IP (MS), IS (MS) 0. 50 Severe 0. 20 2 .00 1, 500 – 10, 000 V 0. 45 Very severe >2 .00 > 10, 000 ... 1 50 to less than 1, 500 0. 50 C 1 50 Type II or eqivalent # Class 2 Exposure 0. 20 to less than 2 .0 1, 500 to less than 10, 000 0. 45 C 1 50 Ty...

Ngày tải lên: 08/08/2014, 10:23

... chemical and mineralogical compositions, 1 40 1 20 100 80 60 40 20 0. 20. 30. 4 0. 50. 60. 70. 8 0 Water/cement ratio Coefficient of permeability (– 10 –11 m/s) Figure 2.2Relationship between the coefficient ... the avail- able silica to form additional C-S-H. For additional information on the role portlandite in hydration and deterioration of concrete consult Skalny et al. (...

Ngày tải lên: 08/08/2014, 10:23

... Durable Concrete, Manual of Concrete Practice, Part 1, The American Concrete Institute, Detroit. ASR (1974– 200 0) In Proceedings of the International Conferences on Alkali-Aggregate Reaction held ... high sulfate concentrations, and it is not only the concentration of sulfate anions per se but also the type and concentration of the accompanying cations that should be taken into c...

Ngày tải lên: 08/08/2014, 10:23

... phosphogypsum) was added. 0 20 40 60 80 100 01 002 003 004 005 006 007 008 00 Relativepeakintensity Distance (microns) Portlandite Gypsum (B) 0 5 10 15 20 25 30 35 40 0 100 200 300 400 500 600 700 800 Relativepeakintensity Distance ... (1982) “Longtime studies and field experiences with sulfate attack , in Sulfate Resistance of Concrete (George Verbeck Symposium), AC...

Ngày tải lên: 08/08/2014, 11:20

... available for reaction with cement components of the concrete mixture. Quality Control is clearly one key issue in the protection of concrete against composition-induced internal sulfate attack. It is ... HEAT-INDUCED INTERNAL SULFATE ATTACK Proper mixture design is one way of protecting concrete against degradation by heat-induced internal sulfate attack. The materials use...

Ngày tải lên: 08/08/2014, 11:20

... 0 50 100 1 50 200 2 50 300 3 50 400 4 50 500 0 0.5 1 1.5 2 2.5 3 3.5 4 0 200 400 600 800 100 0 1 200 1 400 1 600 1 800 Total calcium (g/kg) Position (mm) Simulations Microprobe F igure 7.6 Total calcium profile for a 0. 6 w/c ratio ... Distribution in solid phases for a 0. 6 w/c ratio mixture made of an ASTM Type 1 cement and immersed in a solution of Na 2 SO 4 a...

Ngày tải lên: 08/08/2014, 11:20

... O’Neill 1994; Day 1995; Deposition Transcripts 1996– 200 0; Lichtman et al. 1998; Diamond and Lee 1999; Brown and Badger 200 0; Brown and Doerr 200 0; Diamond 200 0): • Large amounts of concrete were designed ... twenty-eight days, depending on the application, was about 13– 20 MPa (c. 2 ,00 0 to c. 3 ,00 0 psi); • Sulfate concentration in ground water is variable, often even within...

Ngày tải lên: 08/08/2014, 11:20

... 1 4 3 30 0. 50 2 300 0. 55 3 2 80 0.55 3 1.5–3 .0 — 2.4–3.7 — 2 3 40 0. 50 3 3 20 0. 50 4A 3.1–6 .0 ≤ 1 .0 3.8–6.7 ≤ 1.2 2 3 80 0.45 3 3 60 0.45 4B 3.1–6 .0 >1 .0 3.8–6.7 >1.2 3 3 60 0.45 5A >6 .0 ≤ 1 .0 ... requirements for durable concrete, carbonation- and chloride-induced corrosion, freeze-thaw attack and chemical attack , British Cement Association. Hoo...

Ngày tải lên: 08/08/2014, 11:20

Ngày tải lên: 08/08/2014, 11:20