Sülfatın beton ve betonarme elemanlara olumsuz etkisi

Murat DOĞRUYOL; Halim KARAŞİN

Article Details

Sülfatın beton ve betonarme elemanlara olumsuz etkisi

Authors:

Murat DOĞRUYOL | Halim KARAŞİN

Publisher:

Dicle University

Journal:

Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi 2011 Vol.2 Issue 2, pp.79-85

Document Type:

Article

Publication Date:

11/2011

Document Language:

Turkish

Document ID (Org No.):

2000950874

Frequency:

Quarterly

eISSN:

2146-4391

pISSN:

1309-8640

Keywords:

Abstract:

 

One of the reasons deteriorations constitute at the
 concrete and reinforced concrete structures in the
 time is the effect of sulfate.Naturally occuring
 sulfates in soils and groundwater, after a series of
 chemical processes, may lead to durability problems
 causins expansion and disintegration of the
 hardened concrete. Concrete that expose to sulfate
 ions at high-density may destroy completely. Effect
 of fly ashes (FA) and blast furnace slag (BFS) on
 properties of superplasticizer (SP) added concrete
 was investigated against to sufate effect. FA and
 BFS were added to Portland cement (PÇ 42,5) 20 %
 by weight of the cement. FA and BFS replacement
 concretes were compared with each other as well as
 with Portland cement concrete. 15 cm cube
 specimens were prepared with produced concrete
 and cured at 7, 28, 90 and 150 days For this
 purpose, high density sulfate of soils were examined
 by comparing the ratio of TS 12457-4 Standards. In
 this study, pozzolanic additions were added to
 changing in ratio 20 % by weight of the (PÇ. 42.5)
 portland cement. The 0.56 water/cement ratio and
 300kg/m3
  cement dozage are selected as reference. A
 control concrete sample is also produced having the
 same dozage. The performance of mineral
 additives concrete was obtained both in the
 sulphate and water cures. In this context, three
 series of concrete samples was produced; in two
 concrete samples series the certain ratio of fly
 ash and granulated blast furnace slag was used
 as additives, and one series of sample was used
 without additives. In order to see the effect
 strength and durability of concrete at high-rate
 sulfate, concrete samples were rested in a
 solution of Na2SO4(150 g / l) in accordance
 with ASTM C 1012. One group of specimens
 was kept continuously in sodium sulphate
 solution with concentration of 150 g/l for 5
 months.. The other group samples were rested
 in water and compressive strengths are
 presented as a comparatively. At the end of each
 curing period, a total of 3 specimens were tested
 for each concrete property. Surface hardness
 and compressive strength of Concrete samples
 exposed to Sulphate effect were measured
 regularly. At the same time, the surface
 distortions and changes of weight of the
 samples were observed periodically. As a
 result, sulfate is determined to decrease upon
 the strength and durability of concrete
 structures. Moreover, The results showed that
 use of %20 FA(Fly Ash) as replacement of
 portland cement increased the strength
 properties of concrete samples. Economical
 benefit can be achieved by using pozzolanic
 additions in the concrete mixture. As a
 conclusion use of such additions, waste
 materials, provide both durable and economic
 concrete structures and ecologic balance for.

Article Details

Sülfatın beton ve betonarme elemanlara olumsuz etkisi

Authors:

Murat DOĞRUYOL | Halim KARAŞİN

Publisher:

Dicle University

Journal:

Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi 2011 Vol.2 Issue 2, pp.79-85

Document Type:

Article

Publication Date:

11/2011

Document Language:

Turkish

Document ID (Org No.):

2000950874

Frequency:

Quarterly

eISSN:

2146-4391

pISSN:

1309-8640

Sülfat etkisi

beton basınç değeri

betondaki bozulma

dayanıklılık

Issues

Article Details

Sülfatın beton ve betonarme elemanlara olumsuz etkisi

Authors: Murat DOĞRUYOL | Halim KARAŞİN

Publisher: Dicle University

Journal: Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi 2011 Vol.2 Issue 2, pp.79-85

Document Type: Article

Publication Date: 11/2011

Document Language: Turkish

Document ID (Org No.): 2000950874

Frequency: Quarterly

eISSN: 2146-4391

pISSN: 1309-8640

Sülfat etkisi

beton basınç değeri

betondaki bozulma

dayanıklılık

Issues

Authors:

Murat DOĞRUYOL | Halim KARAŞİN

Publisher:

Dicle University

Journal:

Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi 2011 Vol.2 Issue 2, pp.79-85

Document Type:

Article

Publication Date:

11/2011

Document Language:

Turkish

Document ID (Org No.):

2000950874

Frequency:

Quarterly

eISSN:

2146-4391

pISSN:

1309-8640