Journal of the Korea Institute of Building Construction (한국건축시공학회지)

The Korean Institute of Building Construction (한국건축시공학회)
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Properties of Inorganic Adhesives according to Phosphate Type and Borax Ratio

인산염 종류와 붕사 첨가율에 따른 무기접착재의 특성

  • Song, Ha-Young (Department of Architectural Engineering, Hanbat National University) ;
  • Lim, Jeong-Jun (Department of Architectural Engineering, Hanbat National University) ;
  • Khil, Bae-Su (CEO, Tripod Co., Inc) ;
  • Lee, Sang-Soo (Department of Architectural Engineering, Hanbat National University)
  • Received : 2019.01.21
  • Accepted : 2019.06.05
  • Published : 2019.08.20
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Abstract

Epoxy resin adhesives are currently used as adhesives in buildings. Epoxy resin adhesives, which are organic materials, generate harmful substances when producing adhesives, and toxic substances are high in the residential space after installation. In addition, a large amount of carbon monoxide generated from organic materials in the case of a building fire leads to personal injury. This study evaluates the feasibility of inorganic adhesives using pure inorganic materials such as magnesia, phosphate, and borax as inorganic adhesives to replace existing organic adhesives. As a result of the experiment on the selection of adequate phosphate and the characteristics of the addition rate of borax used as a retarder, the potassium phosphate monobasic was obtained as a suitable phosphate and the characteristics according to the borax addition rate were compared with the quality standard of KS F 4923 The hardening shrinkage and heat change rate satisfied the quality standards. The tensile strength was satisfactory when the borax addition rate was 4% or more, but the adhesive strength did not meet the quality standards. Further studies are needed to improve adhesion strength.

현재 건축물에 사용되는 접착제는 주로 유기질 재료인 에폭시 수지 접착제가 사용되고 있다. 유기질 재료인 에폭시 수지 접착제는 유기성 물질로 접착제 생산 시 유해물질이 발생하며, 시공 후에도 유해물질이 실내거주공간에서 높게 나타난다. 또한 건축물 화재 시 유기 재료에서 발생되는 다량의 일산화탄소가 인명피해로 이어진다. 본 연구는 순수무기계 재료인 산화마그네시아, 인산염, 붕사를 사용한 무기 접착재에 대해 기존 유기 접착제를 대체 할 무기 접착재로의 활용가능성을 평가한 연구이다. 적정 인산염 선정에 관한 실험과 지연제로서 활용한 붕사의 첨가율에 대한 특성을 실험한 결과 적정 인산염으로 제1인산칼륨이 도출되었으며, 붕사 첨가율에 따른 특성을 측정한 결과 KS F 4923의 품질기준과 비교하여 경화수축률과 가열변화율은 품질기준을 만족하였으며, 인장강도는 붕사 첨가율 4% 이상에서 만족하는 결과가 나왔지만 접착강도의 경우 품질 기준을 충족하지 못하였다. 향후 접착강도 증진을 위한 추가적인 연구가 필요할 것으로 판단된다.

Keywords

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Figure 1. Epoxy curing mechanism

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Figure 2. Mixing method

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Figure 3. Compressive strength according to KHPO4 addition ratio

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Figure 4. Compressive stength according to NH4H2PO4 addition ratio

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Figure 5. Compressive stength according to NaH2PO4 addition ratio

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Figure 6. Pot life according to phosphate types

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Figure 7. Hardening shapes according to phosphate types

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Figure 8. Adhesive strength and tensile strength according to borax addition ratio

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Figure 9. Rate of heat change according to borax addition ratio

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Figure 10. Rate of harden shrinkage according to borax addition ratio

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Figure 11. Pot life according to borax addition ratio

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Figure 12. Compressive strength according to borax addition ratio

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Figure 13. Flexural strength according to borax addition ratio

Table 1. Quality standard of epoxy resin adhesive

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Table 2. Factors and levels of fundamental experiment

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Table 3. Factors and levels of main experiment

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Table 4. Properties of used materials

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Table 5. Properties of phosphate

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References

  1. Kim TH, Sin JH, Lee SS. Mechanical properties of matrix using dead burn magnesia and phosphate according to addition ratio FA. Spring Conference of the Korea Concrete institute; 2016 May 11-13; Yeosu, Korea. Seoul (Korea): Korea Concrete Institute; 2016. p. 633-4.
  2. Kim TH. Properties of inorganic filler adhesive utilizing dead-burn magnesia and fly ash [master's thesis]. [Daejeon (Korea)]: Hnabat University; 2018. 60 p.
  3. Lee KH, Yoon HS, Yang KH. Effect of phosphate to binder and water to binder ratio on magnesia-postassium phosphate cement. Journal of the Korea Concrete Institute. 2017 Jun; 29(3):275-81. https://doi.org/10.4334/JKCI.2017.29.3.275
  4. Kang IS, Ahn MY, Paik MS, Jung SJ. A study on field and hydration properties ultra rapid hardening mortar using magnesia-phosphate cement. Journal of the Architectural Institute of Korea Structure & Construction. 2008 Feb;24(2): 79-86.
  5. Lee HG, Ahn KY, Sim JS. Experimental study on perfomance of mgo-based patching materials for rapid repair of concrete pavement. International Journal of Highway Engineering. 2016 Feb;18(1):43-55. https://doi.org/10.7855/IJHE.2016.18.1.043
  6. Kang IS, Ahn MY, Paik MS, Lim NG, Moon JS, Jung SJ. A study on the basic properties analysis of ultra rapid hardening mortar using magnesia-phosphate cement. Journal of the Architectural Institute of Korea Structure & Construction. 2007 Aug;23(8):139-48.
  7. Lee HG, Lee JM, Lee IH, Kim YJ, Oh HS. Compressive strength characteristics of mpc mortar according to magnesia and binder ratio. Spring Conference of the Korea Concrete institute; 2016 May 11-13; Yeosu, Korea. Seoul (Korea): Korea Concrete Institute; 2016. p. 635-6.
  8. Ma H, Xu B, Liu H, Pei H, Li Z. Effect of water content, magnesia-to-phosphate molar ratio and age on pore structure, strength and permeability of magnesium potassium phosphate cement paste. Materials and Design. 2014 Dec;64:497-502. https://doi.org/10.1016/j.matdes.2014.07.073
  9. Choi YW, Lee JH, Choi BK, Oh SR. Workability and compressive strength properties of magnesia-potassium phosphate composites for biological panel. Journal of the Academy Industrial Cooperation Society of Korea. 2017 Jul;18(7):357-64. https://doi.org/10.5762/KAIS.2017.18.7.357
  10. Ahn MY. The properties of ultra rapid hardening mortar for repair using magnesia-phosphate cement [dissertation]. [Seoul (Korea)]: Dankook University; 2008. 175 p.
  11. Yang N, Shi C, Yang J, Chang Y. Research progresses in materials magnesium phosphate cement-based materials. Journal of Materials in Civil Engineering. 2014 Oct;26(10):1-8. https://doi.org/10.1061/(ASCE)MT.1943-5533.0000971