TR202000983A2 - A CONCRETE ADDITIVE AND A CONCRETE WITH ADDITIVE - Google Patents

A CONCRETE ADDITIVE AND A CONCRETE WITH ADDITIVE

Info

Publication number
TR202000983A2
TR202000983A2 TR2020/00983A TR202000983A TR202000983A2 TR 202000983 A2 TR202000983 A2 TR 202000983A2 TR 2020/00983 A TR2020/00983 A TR 2020/00983A TR 202000983 A TR202000983 A TR 202000983A TR 202000983 A2 TR202000983 A2 TR 202000983A2
Authority
TR
Turkey
Prior art keywords
concrete
additive
nylon
fibers
polypropylene
Prior art date
Application number
TR2020/00983A
Other languages
Turkish (tr)
Inventor
Alparslan Uğur
İzmi̇t İlhan
Original Assignee
Kordsa Tekni̇k Teksti̇l Anoni̇m Şi̇rketi̇
Kordsa Teknik Tekstil As
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kordsa Tekni̇k Teksti̇l Anoni̇m Şi̇rketi̇, Kordsa Teknik Tekstil As filed Critical Kordsa Tekni̇k Teksti̇l Anoni̇m Şi̇rketi̇
Priority to TR2020/00983A priority Critical patent/TR202000983A2/en
Priority to PCT/TR2021/050046 priority patent/WO2021150194A1/en
Publication of TR202000983A2 publication Critical patent/TR202000983A2/en

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/07Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
    • E04C5/073Discrete reinforcing elements, e.g. fibres

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

Bu buluş, betonarme yapıların klor direncinin, buna bağlı olarak korozyon direncinin ve buna bağlı olarak ömrünün uzatılmasını, beton karışımının tasarımının değiştirilmesine ihtiyaç duymadan artıran, makro polipropilen lif ve mikro Nylon 6.6 lif içeren bir beton katkısı ve bu katkı ile katkılanmış bir beton ile ilgilidir.The present invention relates to a concrete admixture containing macro polypropylene fiber and micro Nylon 6.6 fiber and a concrete additive with this admixture, which increases the chlorine resistance of reinforced concrete structures, accordingly the corrosion resistance and accordingly the prolongation of its life, without the need to change the design of the concrete mix.

Description

TARIFNAME BIR BETON KATKISI VE KATKILI BIR BETON Teknik Alan Bu bulus, betonarme yapilarin ömrünün uzatilmasini saglayan bir beton katkisi ve bu katki ile katkilanmis bir beton ile ilgilidir. Önceki Teknik Içinde çelik elemanlarin bulundugu betonarme yapilarin ömrü, bahsedilen çeliklerin korozyona ugrama süresi ile iliskilidir. Çelik korozyona ugradiginda bahsedilen yapilar ömürlerini tamamlamaktadir. Ömrünü tamamlayan yapilar ise yikilmakta ve bunlarin yerine yeni yapilar yapilmaktadir. Alternatif olarak, çelikte meydana gelen kesit kaybi önceden tespit edildiginde, yapiya yeni elemanlar eklenmekte ve böylelikle yapi, sismik etkilere karsi dayanikli hale getirilmektedir. Anotta meydana gelen yükseltgenme (oksitlenme) mekanizmasi, klor iyonunun varliginda hizlanmaktadir. Klor iyonlari, elektronegatifliklerinin yüksek olmasi sebebiyle, elektron alisverisini çok hizli bir sekilde saglamakta ve bunu betonun içerisinde bulunan çelik üzerinden gerçeklestirmektedir. Bu sebeple, içerisinde çelik bulunan betonarme yapilann klor iyonunun geçisine karsi dirençli olmasi gerekmektedir. Polipropilen ve Nylon 6.6 polimerinden mamül liflerin beton içerisinde yük tasimaya yönelik kullanimi ve erken yas beton özelliklerinin iyilestirilmesi için kullanimi teknigin bilinen durumunda yer almaktadir. Ancak, bahsedilen liflerin betonarme yapilarin ömrünün uzatilmasi ile ilgili bir kullanimina teknigin bilinen durumunda rastlanmamaktadir. 9081.160 Teknigin bilinen durumunda yer alan CN109266199 sayili Çin patent dokümaninda, beton elemanlarin ömrünün uzatilmasi için bir boya bilesiminden bahsedilmektedir. Taze betona üretim safhasinda katilan mineraller her ne kadar klor iyonlarinm geçisine karsi bir direnç olustursa da bu malzemeler betonun karisim tasariminin degistirilmesini gerektirmektedir. Ayrica, söz konusu malzemelerin ince malzemeler olmasi sebebi ile betonun karisim suyunun artirilmasi gerekmektedir. Betonun klor direncini, buna bagli olarak korozyon direncini ve buna bagli olarak ömrünü, karisim tasariminin degistirilmesine ihtiyaç duymadan artiran bir katkiya ihtiyaç duyulmaktadir. Bulusun Kisa Açiklamasi Bu bulusun amaci, betonarme yapilarin klor direncinin, buna bagli olarak korozyon direncinin ve buna bagli olarak ömrünün uzatilmasini, beton karisiminin tasariminin degistirilmesine ihtiyaç duymadan artiran bir beton katkisi ve bu katki ile katkilanmis bir beton gerçeklestirmektir. Bulusun Ayrintili Açiklamasi Bulusun tercih edilen uygulamasinda betonun klor direncinin artirilmasi için betonda Nylon 6,6 mikro lifler ve polipropilen makro lifler kullanilmaktadir. Nylon 6,6 mikro lifler ve polipropilen makro lifler kullanilarak katkilanan betonun klor migrasyon degerleri, NT BUILD 492 test yöntemi kullanilarak tayin edilmistir. Bu testler (deneyler) sonucunda, yalin betona ait klor migrasyon katsayisi 18,6›(1012 m2/S olarak tayin edilmistir. Betonun 1,5 kg/m3 -7' kg/m3 araliginda 40mm makro polipropilen lif ve 0,2 kg/m3 - 2kg/m3 araliginda mikro N ylon 6,6 lif ile katkilandigi durumda klor migrasyon katsayisinin l4,7›<10'12 m2/s oldugu görülmektedir. 9081.160 - 2 kg/m3 araliginda mikro Nylon 6,6 lif ile katkilanmasi durumunda ise bu deger 16,l<10'12 m2/s mertebesinde olmaktadir. Bu deneyle ilgili veriler Tablo l"de verilmektedir. Deney no Lif Çesidi Lif dozaji(kg/m3) Migîîsâîign Isil/:35131151 1 Yalin Beton 0 18,6 54 mmPP Makro lif+ "15 kalma -7 kg/m3 2 '[2 mm Nylon 6 6 araliginda makro) + 16 i araliginda mikro) 40 mmPP Makro 1if+ (135 lig/m3 -7 kis/mg 3 12 mm Nylon 6 6 araliginda makro) + 14 7 araliginda mikro) Tablo 1. Klor iyonu migrasyon katsayisina iliskin üçer numune seti ile 24 saat boyunca yapilan deneye ait sonuçlar Deney sonuçlari, betonun Nylon 6,6 mikro lifler ve polipropilen makro liHer ile katkilanmasi halinde klor migrasyon katsayisinin %20 civarinda azaldigini göstermektedir. Diger bir deyisle, beton karisimi içerisine yalnizca lif eklenmesi sayesinde beton karisiminin tasarimi degistirilmeden, mevcutta kullanilan betonun ömrü %20 civarinda artirilabilmektedir. Bahsedilen katkilama, klorun beton içerisindeki çelik çubuklara ulasmasini geciktireceginden, hiçbir yük tasimayan ve sadece beton içindeki çelik çubuklari korumak amaci ile yapilarda bulunan pas payi azaltilabilmektedir. Diger bir deyisle, katkili betonun ömrünün mevcut betonlarla ayni tutuldugu durumlarda pas payi %20 azaltilabilmekte ve dolayisi ile ayni yapi daha az malzeme kullanilarak elde edilebilmektedir. Yukarida açiklanan deneyde kullanilan N ylon 6.6 mikro sentetik liflerin özellikleri Tablo 2"de verilmektedir. Yukarida açiklanan deneyde kullanilan polipropilen makro liflerin özellikleri Tablo 3"te verilmektedir. Deger Kullanilan standart Özgül agirlik 0,91, g/cm3 ASTM D 792 Alkali Direrici Çok iyi ASTM E 2098 Tablo 3. Deneyde kullanilan Polipropilen makro liflerin özellikleri 9081.160 Deger Kullanilan standart Özgül agirlik 1,14, g/em3 ASTM D 792 Tenasite 60-100 cN/dex Alkali Direnci Çok iyi ASTM E 2098 Tablo 2. Deneyde kullanilan Nylon 6.6 mikro sentetik liflerin özellikleri Tabi ki teknikte uzman kisinin Nylon 6,6 mikro lifler ve polipropilen makro lifler için farkli karisim oranlarini deneyebilecegi, bahsedilen Nylon 6,6 mikro lifler ve polipropilen makro lifleri farkli liflerle kombine edebilecegi açiktir. Klor migrasyonu üzerindeki etkilerin yani sira, bahsedilen Nylon 6,6 mikro lif ve polipropilen mikro lif katkisi, betonun egilme ve çekme etkileri altinda çatlamasi durumunda dahi dagilmamasini saglamakta ve böylelikle çatlak sinirlandirici olarak kullanilmaktadir. Bahsedilen katkilarm beton içerisinde homojen olarak dagilmasi sayesinde betonun her noktasinda klor migrasyonunun azaltilmasi ve çatlaklarin sinirlandirilmasi faydalari saglanmaktadir. TR TR DESCRIPTION A CONCRETE ADDITIVE AND ADDITIVE CONCRETE Technical Field This invention relates to a concrete additive that enables the life of reinforced concrete structures to be extended and to a concrete added with this additive. Prior Art The lifespan of reinforced concrete structures containing steel elements is related to the corrosion time of the said steels. When the steel corrodes, the mentioned structures complete their life. Structures that have completed their service life are demolished and new structures are built in their place. Alternatively, when the section loss occurring in the steel is detected in advance, new elements are added to the structure and thus the structure is made resistant to seismic effects. The oxidation mechanism occurring at the anode is accelerated in the presence of chloride ion. Chlorine ions, due to their high electronegativity, provide electron exchange very quickly and do this through the steel in the concrete. For this reason, reinforced concrete structures containing steel must be resistant to the passage of chloride ions. The use of fibers made of polypropylene and Nylon 6.6 polymer for load bearing in concrete and for improving the properties of early age concrete is within the known state of the art. However, there is no use of the mentioned fibers in extending the life of reinforced concrete structures in the known state of the art. 9081.160 In the state-of-the-art Chinese patent document numbered CN109266199, a paint composition is mentioned to extend the life of concrete elements. Although the minerals added to fresh concrete during the production phase create resistance against the passage of chloride ions, these materials require changing the mix design of the concrete. Additionally, since the materials in question are thin materials, the mixing water of the concrete must be increased. There is a need for an additive that increases the chlorine resistance of concrete, its corrosion resistance and therefore its life, without the need to change the mix design. Brief Description of the Invention The purpose of this invention is to produce a concrete additive that increases the chlorine resistance, corrosion resistance and therefore the life of reinforced concrete structures, without the need to change the design of the concrete mixture, and a concrete added with this additive. Detailed Description of the Invention In the preferred application of the invention, Nylon 6.6 micro fibers and polypropylene macro fibers are used in concrete to increase the chlorine resistance of concrete. Chlorine migration values of concrete added using nylon 6.6 micro fibers and polypropylene macro fibers were determined using the NT BUILD 492 test method. As a result of these tests (experiments), the chloride migration coefficient of plain concrete was determined as 18.6›(1012 m2/s). It is seen that the chlorine migration coefficient is l4.7›<10'12 m2/s when it is added with micro Nylon 6.6 fiber in the range of m3 - 2kg/m3. In case it is added with micro Nylon 6.6 fiber in the range of 9081.160 - 2 kg/m3 This value is at the level of 16.l<10'12 m2/s. Data related to this experiment are given in Table 1. Experiment number Fiber Type Fiber dosage (kg/m3) Migîîsâîign Heat/:35131151 1 Plain Concrete 0 18.6 54 mmPP Macro fiber+ "15 cal -7 kg/m3 2 '[2 mm Nylon 6 in 6 interval macro) + 14 7 micro) Table 1. Results of the experiment conducted for 24 hours with three sample sets regarding the chloride ion migration coefficient. The test results show that the chlorine migration coefficient decreases by around 20% when the concrete is added with Nylon 6.6 micro fibers and polypropylene macro fibers. . In other words, by simply adding fiber into the concrete mixture, the lifespan of the currently used concrete can be increased by around 20% without changing the design of the concrete mixture. Since the mentioned additive will delay the chlorine from reaching the steel bars in the concrete, the rust in the structures can be reduced in order to protect only the steel bars in the concrete, which do not carry any load. In other words, in cases where the life of admixed concrete is kept the same as existing concrete, the rust margin can be reduced by 20% and therefore the same structure can be obtained by using less material. The properties of Nylon 6.6 micro synthetic fibers used in the experiment explained above are given in Table 2. The properties of polypropylene macro fibers used in the experiment explained above are given in Table 3. Value Standard used Specific gravity 0.91, g/cm3 ASTM D 792 Alkali Resistant Very good ASTM E 2098 Table 3. Properties of Polypropylene macro fibers used in the experiment 9081.160 Value Standard used Specific gravity 1.14, g/em3 ASTM D 792 Tenacity 60- 100 cN/dex Alkali Resistance Very good ASTM E 2098 Table 2. Properties of Nylon 6.6 micro synthetic fibers used in the experiment. Of course, the person skilled in the art can try different mixing ratios for Nylon 6.6 micro fibers and polypropylene macro fibers, the mentioned Nylon 6.6 micro fibers. and it is clear that polypropylene macro fibers can be combined with different fibers. In addition to the effects on chlorine migration, the mentioned Nylon 6,6 microfiber and polypropylene microfiber additive ensures that the concrete does not disperse even if it cracks under bending and tensile effects, and thus is used as a crack limiter. Thanks to the homogeneous distribution of the mentioned additives in the concrete, the benefits of reducing chlorine migration and limiting cracks are provided at every point of the concrete. TR TR

Claims (4)

ISTEMLER 1. En azindan Nylon 6,6 mikro lifler ve polipropilen makro lifler içermesi ile karakterize edilen bir katki maddesi. kg/m3 yogunlukta polipropilen makro liiler içermesi ile karakterize edilen1. An additive characterized by containing at least Nylon 6,6 microfibres and polypropylene macrofibres. It is characterized by containing polypropylene macrolides with a density of kg/m3. Istem 1°deki gibi bir katki maddesi.An additive according to claim 1. 3. Istem 1 veya istem 2”den herhangi birindeki gibi bir katki maddesi ile katkilanmis bir beton.3. A concrete added with an additive according to any of claim 1 or claim 2. 4. Istem 1 veya Istem 2”den herhangi birindeki gibi bir katki maddesinin betonun klor migrasyon katsayisinin düsürülmesi için kullanimi. 9081.1604. Use of an additive according to any of Claim 1 or Claim 2 to reduce the chloride migration coefficient of concrete. 9081.160
TR2020/00983A 2020-01-22 2020-01-22 A CONCRETE ADDITIVE AND A CONCRETE WITH ADDITIVE TR202000983A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
TR2020/00983A TR202000983A2 (en) 2020-01-22 2020-01-22 A CONCRETE ADDITIVE AND A CONCRETE WITH ADDITIVE
PCT/TR2021/050046 WO2021150194A1 (en) 2020-01-22 2021-01-20 A concrete additive and a reinforced concrete

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TR2020/00983A TR202000983A2 (en) 2020-01-22 2020-01-22 A CONCRETE ADDITIVE AND A CONCRETE WITH ADDITIVE

Publications (1)

Publication Number Publication Date
TR202000983A2 true TR202000983A2 (en) 2021-07-26

Family

ID=76993226

Family Applications (1)

Application Number Title Priority Date Filing Date
TR2020/00983A TR202000983A2 (en) 2020-01-22 2020-01-22 A CONCRETE ADDITIVE AND A CONCRETE WITH ADDITIVE

Country Status (2)

Country Link
TR (1) TR202000983A2 (en)
WO (1) WO2021150194A1 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9896382B2 (en) * 2009-11-02 2018-02-20 Dror Selivansky Fiber-reinforced structures and processes for their manufacture
KR101134459B1 (en) * 2009-12-10 2012-04-13 한국건설기술연구원 Cement concrete making method using micro and macro fiber and the cement concrete, the paving method therewith

Also Published As

Publication number Publication date
WO2021150194A1 (en) 2021-07-29

Similar Documents

Publication Publication Date Title
Pakravan et al. Study on fiber hybridization effect of engineered cementitious composites with low-and high-modulus polymeric fibers
Pająk et al. Experimental investigation on hybrid steel fibers reinforced self-compacting concrete under flexure
Çavdar The effects of high temperature on mechanical properties of cementitious composites reinforced with polymeric fibers
Alsadey et al. Influence of polypropylene fiber on strength of concrete
Singh et al. A review of fiber synergy in hybrid fiber reinforced concrete
Hazlin et al. Microstructure and tensile strength of foamed concrete with added polypropylene fibers
Nadgouda Coconut fibre reinforced concrete
TR202000983A2 (en) A CONCRETE ADDITIVE AND A CONCRETE WITH ADDITIVE
Parmentier et al. Dispersion of the mechanical properties of FRC investigated by different bending tests
Sam et al. Durability study on coir fibre reinforced concrete
Parmentier et al. Evaluation of the scatter of the postpeak behaviour of fibre reinforced concrete in bending: A step towards reliability
Han et al. Analysis on the Impact of the Type and Content of SBS on the Performance of the Modified Asphalt Mixture
Suresh et al. Strength and Behaviour of Concrete by Using Natural and Artificial Fibre Combiations
Khan et al. Strength Gain Analysis of Polypropylene Fiber Reinforced Concrete
Shirule et al. Reuse of steel scrap from lathe machine as reinforced material to enhance properties of concrete
Dawood et al. High performance lightweight concrete reinforced with glass fibers
Jena et al. Effect of Silpozz and Fly Ash on Strength and Durability Properties of Concrete in Sea Water
Hassander et al. Methods for testing morphology-property relationships in rubber blends
Gallo et al. Stone mastic asphalt reinforced by vegetable yarns
Hadipramana et al. Study on Workability High Strength Concrete Containing Pineapple Leaf Fiber (PALF)
Ansari et al. Effect of waste steel binding wires on strength of concrete
Lee Properties of Hybrid Fiber Reinforced Cement Mortars as a Function of Type of Fiber
Kim et al. A Study on the Basic Properties of Polymer Repair Mortar Using Waste Fishing Nets as Fibers
Garg et al. Fracture toughness of concrete by using recycle aggregates in addition with S2 glass fiber
BHADRIRAMAN KS Investigational Study on Strength Of Fiber Concrete Using Bamboo