KR20230085030A - Substitute-sand which mixed with recycled plastic chips and cement - Google Patents
Substitute-sand which mixed with recycled plastic chips and cement Download PDFInfo
- Publication number
- KR20230085030A KR20230085030A KR1020210173628A KR20210173628A KR20230085030A KR 20230085030 A KR20230085030 A KR 20230085030A KR 1020210173628 A KR1020210173628 A KR 1020210173628A KR 20210173628 A KR20210173628 A KR 20210173628A KR 20230085030 A KR20230085030 A KR 20230085030A
- Authority
- KR
- South Korea
- Prior art keywords
- sand
- substitute
- cement
- pet
- present
- Prior art date
Links
- 239000004576 sand Substances 0.000 title claims abstract description 71
- 229920003023 plastic Polymers 0.000 title claims abstract description 41
- 239000004033 plastic Substances 0.000 title claims abstract description 41
- 239000004568 cement Substances 0.000 title abstract description 27
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 16
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 16
- 239000013502 plastic waste Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000011398 Portland cement Substances 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 4
- 235000012149 noodles Nutrition 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 238000003912 environmental pollution Methods 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- 239000005020 polyethylene terephthalate Substances 0.000 description 18
- 230000005484 gravity Effects 0.000 description 17
- 239000000463 material Substances 0.000 description 12
- 239000000203 mixture Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 229920006328 Styrofoam Polymers 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- -1 gravel Substances 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000008261 styrofoam Substances 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 239000011449 brick Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002453 shampoo Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/004—Devices for shaping artificial aggregates from ceramic mixtures or from mixtures containing hydraulic binder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/24—Producing shaped prefabricated articles from the material by injection moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/14—Apparatus or processes for treating or working the shaped or preshaped articles for dividing shaped articles by cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
- B28B17/02—Conditioning the material prior to shaping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/0007—Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust
- B28C7/0023—Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust by heating or cooling
- B28C7/003—Heating, e.g. using steam
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/021—Agglomerated materials, e.g. artificial aggregates agglomerated by a mineral binder, e.g. cement
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/18—Waste materials; Refuse organic
- C04B18/20—Waste materials; Refuse organic from macromolecular compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
본 발명은 종래 콘크리트를 제조할 때 자갈과 모래 및 시멘트를 혼합하여 제조하던 것과 달리 모래 대신에 플라스틱 폐기물 중 PET와 PP 및 HDPE를 선별하여 이를 5mm 이하 칩으로 파쇄한 다음, 여기에 10~15%의 시멘트를 혼합하고 이를 230℃ 가까운 온도에서 가압하여 두께 3mm 정도의 판상으로 만든 후 이를 세로 및 가로로 각각 3mm 정도 간격으로 절단하여 알갱이 모양 모래대용품을 얻는 방법과, 5mm 이하 크기로 파쇄한 PET, PP 및 HDPE의 재생플라스틱 칩에 10~15%의 시멘트를 혼합한 후 265~275℃로 녹인 다음 이를 직경 3mm 정도 굵기의 여러 가닥으로 사출시킨 후 이를 가로로 3mm 정도의 간격으로 절단하여 알갱이 모양 모래대용품을 얻는 방법이다. 본 발명의 모래대용품은 콘크리트 제조 시 막대한 양이 소요되는 강모래나 바닷모래를 대체하여 사용할 수 있고, 막대한 양으로 쏟아져 나오는 폐플라스틱을 효과적으로 재활용할 수 있으며, 폐플라스틱으로 인한 환경공해를 줄일 수 있다.The present invention, unlike the conventional manufacturing of concrete by mixing gravel, sand and cement, selects PET, PP, and HDPE from plastic waste instead of sand, crushes them into chips of 5 mm or less, and then mixes them by 10 to 15% A method of obtaining a granular sand substitute by mixing cement and pressurizing it at a temperature close to 230 ° C to make a plate with a thickness of about 3 mm, and then cutting it vertically and horizontally at intervals of about 3 mm, respectively, PET, which is crushed to a size of 5 mm or less, After mixing 10~15% of cement with recycled plastic chips of PP and HDPE, melt it at 265~275℃, inject it into several strands with a diameter of about 3mm, cut them horizontally at intervals of about 3mm, and make granular sand How to get a substitute. The sand substitute of the present invention can be used as a substitute for river sand or sea sand, which requires an enormous amount in the manufacture of concrete, can effectively recycle waste plastic pouring out in huge amounts, and can reduce environmental pollution caused by waste plastic. .
Description
건축용 또는 산업용 콘크리트의 자재로 쓰이는 모래의 대용품으로 쓰일 수 있도록 재생플라스틱 칩과 시멘트를 혼합 제조한 모래대용품의 개발Development of a sand substitute manufactured by mixing recycled plastic chips and cement to be used as a substitute for sand used as a material for construction or industrial concrete
본 발명은 건축용 또는 산업용으로 사용되는 각종 콘크리트의 제조시 시멘트 및 자갈, 물 등과 혼합하여 사용되는 모래 대신에 모래를 대체하여 사용할 수 있는 재생플라스틱 칩을 이용한 모래대용품의 제조 방법에 관한 것이다.The present invention relates to a method for manufacturing a sand substitute using recycled plastic chips that can be used instead of sand mixed with cement, gravel, water, etc. in the manufacture of various types of concrete used for construction or industrial purposes.
본 발명은 종래 시멘트 벽돌이나 블록 및 와이드 모노타일 등과 같은 건축용재나 원통형 흄관, 보도블록 및 암거 등과 같은 산업용재 또는 건축물이나 옹벽, 댐 등과 같은 각종 건축 및 산업용 구조물을 콘크리트로 제조 시 골재(모래 및 자갈)와 시멘트 및 물을 혼합하여 제조케 되며 막대한 양의 모래가 필요하였다. 이와같이 각종 콘크리트 제조 시 필요로 하는 막대한 양의 모래는 일반적으로 강모래나 바닷모래를 사용하며, 일부는 바위를 깨어서 자갈을 만들고 이 자갈을 다시 미세하게 부순 후 5mm 정도의 체로 쳐서 인공모래를 제조하기도 하였다.The present invention is a concrete aggregate (sand and gravel), cement, and water, and a huge amount of sand was required. In this way, river sand or sea sand is generally used for the enormous amount of sand required for the manufacture of various types of concrete, and some of them break rocks to make gravel, crush the gravel again, and then sift it through a 5mm sieve to produce artificial sand. did
본 발명은 자원이 한정되어 있고 점점 더 품귀현상을 보일 뿐 아니라 가격이 상승하고 있는 콘크리트용 강모래나 바닷모래 또는 인공모래 대신에 재생플라스틱 칩과 시멘트를 혼합 제조한 모래대용품을 제공함으로써 이들 강모래나 바닷모래 또는 인공모래의 사용량을 줄일 수 있고, 이 모래대용품을 이용하여 제조한 콘크리트 제품은 모래 대신 재생플라스틱 칩과 시멘트를 혼합 제조한 모래대용품을 사용하기 때문에 중량이 가벼워 운반, 취급 및 축조가 간편하며, 전 세계적으로 막대한 양으로 쏟아져 나오는 플라스틱 폐기물 중 사용 가능한 것을 선별하여 이를 미세하게 파쇄한 후 시멘트와 혼합하고, 이를 가공하여 모래알 크기 정도의 모래대용품을 제공함으로써 플라스틱 폐기물의 효과적 재활용을 기하고, 플라스틱 폐기물로 인한 환경공해를 감소시키고자 안출한 것이다.The present invention provides a sand substitute manufactured by mixing recycled plastic chips and cement instead of river sand for concrete, sea sand, or artificial sand, which has limited resources and is increasingly scarce, and whose price is rising. The use of sea sand or artificial sand can be reduced, and concrete products manufactured using this sand substitute use a sand substitute made by mixing recycled plastic chips and cement instead of sand, so they are light in weight and easy to transport, handle, and construct. It is simple, selects usable plastic waste from the enormous amount of plastic waste pouring out around the world, crushes it finely, mixes it with cement, and processes it to provide a sand substitute the size of a grain of sand, aiming for effective recycling of plastic waste. , it was devised to reduce environmental pollution caused by plastic waste.
본 발명은 골재(모래 및 자갈)와 시멘트 및 모래를 혼합하여 제조하는 콘크리트에 있어서 모래 대신 재생플라스틱 칩과 시멘트를 혼합하여 이를 알갱이 모양으로 제조한 모래대용품을 대체 사용할 수 있도록 한 것으로, 폐기되는 플라스틱 중 활용 가능한 것을 선별한 다음 이를 미세하게 파쇄한 후 이 파쇄한 재생플라스틱 칩에 10~15% 정도의 시멘트를 혼합하고, 이를 PET의 결정 용융 온도인 230℃ 가까운 온도에서 용융되지 않고 가소성이 가장 높을 때 가압하여 두께 3mm 정도의 판상으로 만든 후 이를 세로로 3mm 정도 간격으로 절단하고 가로로도 3mm 정도의 간격으로 절단하여 3×3×3mm 정도의 알갱이 모양 모래 대용품을 얻게 된다. 또 다른 방법은 미세하게 파쇄한 재생플라스틱 칩에 10~15%의 시멘트를 혼합한 후 PET의 사출 가공 온도인 265~275℃로 재생플라스틱 칩과 시멘트의 혼합체를 녹인 다음 이를 직경 3mm 정도 굵기의 여러 가닥의 철사 모양 또는 국수 가닥 모양으로 사출시킨 후 이를 가로로 3mm 정도의 간격으로 절단하면 직경 3mm 정도 알갱이 모양의 재생플라스틱 칩과 시멘트가 혼합된 본 발명의 모래대용품을 얻게 된다. 이같이 하여 얻어진 본 발명의 모래대용품은 콘크리트 제조 시 모래 대신 대체 재료로 사용할 수 있게 된 것이다.The present invention provides a substitute for a sand substitute produced by mixing recycled plastic chips and cement instead of sand in concrete manufactured by mixing aggregate (sand and gravel), cement, and sand, and manufacturing the granulated plastic, which is discarded plastic. After selecting what can be used, it is finely crushed, and 10 to 15% cement is mixed with the crushed recycled plastic chips. When pressed, it is made into a plate with a thickness of about 3 mm, and then it is cut vertically at intervals of about 3 mm and horizontally at intervals of about 3 mm to obtain granular sand substitutes of about 3 × 3 × 3 mm. Another method is to mix finely crushed recycled plastic chips with 10 to 15% cement, melt the mixture of recycled plastic chips and cement at 265 to 275 ° C, which is the injection processing temperature of PET, and then mold them into various molds with a diameter of about 3 mm. After injection in the shape of a wire or noodle strand, it is cut horizontally at intervals of about 3 mm to obtain the sand substitute of the present invention, which is a mixture of granular recycled plastic chips and cement with a diameter of about 3 mm. The sand substitute of the present invention obtained in this way can be used as a substitute material instead of sand in the manufacture of concrete.
본 발명의 재생플라스틱 칩과 시멘트를 혼합 제조한 모래대용품(이하 이를 본 발명의 모래대용품이라 칭한다)의 효과를 살펴보면 다음과 같다. 본 발명의 모래대용품은 종래 골재(모래 및 자갈)와 시멘트 및 물을 섞어서 콘크리트를 제조하던 것과 달리 골재 중의 모래를 본 발명의 모래대용품으로 대체하여 사용할 수 있으므로 엄청난 양의 모래를 절감할 수 있다. 일반적으로 콘크리트 제조용 모래는 강모래나 바닷모래 또는 인공모래를 사용케 되는데, 이들 강모래나 바닷모래 또는 인공모래 대신에 폐기되는 플라스틱 자원을 활용하여 본 발명의 모래대용품을 사용케 됨으로써 자원이 한정되어 있는 강모래나 바닷모래 또는 인공모래를 대체할 수 있게 된 것이다. 또 본 발명의 모래대용품은 중량이 무거운 모래 대신에 재생플라스틱 칩을 주 재료로 한 모래대용품을 사용하므로 중량이 가벼워 운반 및 취급과 설치가 간편하다.The effects of the sand substitute (hereinafter referred to as the sand substitute of the present invention) manufactured by mixing the recycled plastic chips and cement of the present invention are as follows. Unlike conventional manufacturing of concrete by mixing aggregates (sand and gravel) with cement and water, the sand substitute of the present invention can be used by replacing the sand in the aggregate with the sand substitute of the present invention, so a huge amount of sand can be saved. In general, river sand, sea sand, or artificial sand is used as sand for concrete production, but resources are limited by using discarded plastic resources instead of river sand, sea sand, or artificial sand to use the sand substitute of the present invention. It has become possible to replace existing river sand, sea sand, or artificial sand. In addition, since the sand substitute of the present invention uses recycled plastic chips as a main material instead of heavy sand, it is light in weight and easy to transport, handle, and install.
본 발명의 모래대용품은 현재 전세계적으로 매년 4억 6천만 톤에 달하는 플라스틱이 제조되고(2020년 기준) 이중 막대한 양의 플라스틱이 폐플라스틱으로 폐기되는데, 현재 이들 플라스틱의 폐기물에 대한 재활용 방안이 극히 한정되어 있어서 극히 일부만이 섬유원료로 사용되거나, 자동차 부속품 등으로 재활용 되거나, 또는 화학적 재가공으로 재활용되고 대부분 매립 폐기되거나 또는 열에너지로 소각되었지만, 본 발명의 모래대용품은 전 세계적으로 널리 사용되는 각종 콘크리트 제품이나 구조물에 모래 대신 본 발명의 모래대용품을 사용할 수 있게 되어 폐기되는 플라스틱을 효과적으로 재활용할 수 있을 뿐 아니라, 폐플라스틱으로 인한 환경공해의 방지에 큰 효과가 있다.The sand substitute of the present invention currently manufactures 460 million tons of plastic every year worldwide (as of 2020), and a huge amount of plastic is discarded as waste plastic. Since it is limited, only a small part of it is used as a fiber raw material, recycled as automobile parts, etc., or recycled through chemical reprocessing, and most of it is disposed of in landfills or incinerated with thermal energy, but the sand substitute of the present invention is a variety of concrete products widely used worldwide Since the sand substitute of the present invention can be used instead of sand in structures or structures, not only can waste plastics be effectively recycled, but also has a great effect on preventing environmental pollution caused by waste plastics.
또 본 발명의 모래대용품은 비중이 가벼워 물에 뜨기 쉬운 재생플라스틱 칩의 혼합물에 대하여 비중이 평균 3.15 정도로 무거운 포틀랜드 시멘트를 혼합하여 제조함으로써 그 비중이 물보다 무겁게 되며, 콘크리트 제조 시 혼합되는 시멘트, 모래 및 물과 쉽게 혼합될 수 있는 효과가 있다.In addition, the sand substitute of the present invention is manufactured by mixing Portland cement, which has an average specific gravity of about 3.15, with a mixture of recycled plastic chips that are easy to float on water due to its light specific gravity, so that its specific gravity is heavier than that of water. And there is an effect that can be easily mixed with water.
현재 전 세계적으로 글로벌 플라스틱 생산량은 1950년 200만t에서 2020년에는 4억 6000만t으로 230배 가까이 늘어났지만 재활용율은 9%에 머물고 있으며 대부분 매립되거나 소각된다(조선일보 2021. 11. 30자 기사 참고). 즉 매년 4억 6000만t 이상의 플라스틱이 생산되지만 그 중 막대한 양의 플라스틱이 폐기되어 매립되거나 소각되고 일부는 바다로 유입되어 환경공해를 일으키고 있는바, 이같은 플라스틱 폐기물로 인한 환경공해의 방지와 폐플라스틱의 재활용 방안 모색은 매우 중요한 과제로 대두되고 있다. 일반적으로 생산된 플라스틱이 폐기될 경우 폐기되는 플라스틱은 경질의 PET와 PP, HDPE, PVC 등과 주로 비닐류인 LDPE와 주로 스티로폼의 재료가 되는 PS 및 타 재료가 혼합된 기타 플라스틱 등으로 분류되어 배출되고 있다. 본 발명은 페트병의 주 원료로 병체를 제조하는 PET와 뚜껑을 제조하는 PP 및 샴푸나 세제용기 또는 어린이 장난감 등에 사용되는 HDPE를 주로 선별하여 사용케 되며, 고온에서 많은 독성물질과 유해가스를 배출하는 PVC나 비닐류인 LDPE, 스티로폼의 재료가 되는 PS는 선발에서 제외한다.Currently, global plastic production has increased nearly 230 times from 2 million tons in 1950 to 460 million tons in 2020, but the recycling rate remains at 9% and most of them are landfilled or incinerated (Chosun Ilbo, November 30, 2021). see article). In other words, more than 460 million tons of plastic are produced annually, but a huge amount of plastic is discarded and landfilled or incinerated, and some flows into the sea, causing environmental pollution. Prevention of environmental pollution caused by such plastic waste and waste plastic Finding ways to recycle is emerging as a very important task. When generally produced plastics are discarded, the discarded plastics are classified into hard PET, PP, HDPE, PVC, LDPE, which is mainly vinyl, PS, which is mainly used as a material for Styrofoam, and other plastics mixed with other materials. . The present invention mainly selects and uses PET to manufacture bottles, PP to manufacture caps, and HDPE used in shampoo or detergent containers or children's toys as the main raw materials for PET bottles, and to emit many toxic substances and harmful gases at high temperatures. PVC, LDPE, which is a type of vinyl, and PS, which is a material for Styrofoam, are excluded from selection.
본 발명은 이같이 폐기되는 플라스틱 중 활용 가능한 PET. PP 및 HDPE를 선별하여 이를 5mm 이하 미세한 크기의 재생플라스틱 칩으로 파쇄한 다음, 여기에 중량 대비 10~15%의 포틀랜드 시멘트를 혼합하고 이를 PET의 결정 용융온도 230℃ 가까운 온도에서 PET가 용융되지 않고 가소성이 가장 높을 때 이를 가압하여 두께 3mm 정도의 판상으로 만든 후 이를 세로로 3mm 정도 간격으로 절단하고 가로로도 3mm 정도의 간격으로 절단하면 3×3×3mm 정도의 알갱이 모양 모래 대용품을 얻게 된다. 또 다른 방법은 PET, PP 및 HDPE를 선별하여 이를 5mm 이하로 미세하게 파쇄한 재생플라스틱 칩에 10~15%의 포틀랜드 시멘트를 혼합하고 PET의 사출 가공 온도인 265~275℃로 재생플라스틱 파쇄물과 시멘트 혼합체를 녹인 다음 이를 직경 3mm 정도의 굵기로 여러 가닥의 철사 모양 또는 국수 가닥 모양으로 사출시킨 후 이를 가로로 3mm 정도의 간격으로 절단하면 직경 3mm 정도의 알갱이 모양 재생플라스틱 칩과 시멘트가 혼합된 본 발명의 모래대용품을 얻게 된다. 이때 PP는 용융온도가 160℃ 내외이고 HDPE는 용융온도가 104~112℃이므로 PET의 사출 가공 온도에서 용융상태로 함께 사출된다.The present invention is PET, which can be utilized among the discarded plastics. PP and HDPE are sorted and crushed into recycled plastic chips with a size of 5 mm or less, and then 10 to 15% of Portland cement is mixed by weight, and PET is not melted at a temperature close to the crystal melting temperature of PET at 230 ° C. When plasticity is highest, pressurize it to make it into a plate with a thickness of about 3 mm, and then cut it vertically at intervals of about 3 mm and horizontally at intervals of about 3 mm to obtain granular sand substitutes of about 3 × 3 × 3 mm. Another method is to select PET, PP, and HDPE, mix 10 to 15% of Portland cement in recycled plastic chips that are finely crushed to 5 mm or less, and use the crushed recycled plastic material and cement at 265 to 275 ° C, which is the injection processing temperature of PET. After melting the mixture, it is injected in the shape of several wires or noodle strands with a thickness of about 3 mm in diameter, and then cut it at intervals of about 3 mm horizontally to obtain a mixture of granular recycled plastic chips and cement with a diameter of about 3 mm. of sand substitutes are obtained. At this time, PP has a melting temperature of around 160 ° C and HDPE has a melting temperature of 104 to 112 ° C, so they are injected together in a molten state at the injection processing temperature of PET.
본 발명에서 PET, PP 및 HDPE 혼합 파쇄물에 10~15%의 포틀랜드 시멘트를 혼합하는 이유는 병(bottle)의 재료인 PET의 비중이 1.38 내외이고, 뚜껑(cap)의 재료인 PP의 비중이 0.90 내외이며, HDPE의 비중은 0.96 정도로 알려져 있는데, 이들은 물보다 다소 비중이 무거운 PET가 있는가 하면, 물보다 비중이 가벼운 PP나 HDPE가 혼합되어 있어서, 이들의 혼합물이 물보다 비중이 가볍거나 물의 비중과 비슷하면 물에 뜨기 쉬우며, 콘크리트 제조 시 자갈 및 시멘트, 물과 혼합하면 물 위에 부유하면서 잘 섞이지 않을 우려가 있다. 그러나 본 발명에서 PET, PP 및 HDPE의 혼합물인 재생플라스틱 칩에 비중이 3.10~3.18이고 평균 3.15 정도인 포틀랜드 시멘트를 섞게 되면 재생플라스틱 칩과 포틀랜드 시멘트의 혼합물이 물보다 비중이 크고 물에 뜨지 않으며, 콘크리트 제조 시 혼합되는 자갈 및 시멘트, 물과 친화성이 커서 잘 혼합될 수 있게 된다.In the present invention, the reason why 10 to 15% of Portland cement is mixed with PET, PP, and HDPE mixed crushed material is that the specific gravity of PET, the material of the bottle, is around 1.38, and the specific gravity of PP, the material of the cap, is 0.90. It is known that the specific gravity of HDPE is about 0.96, and these include PET, which has a specific gravity slightly heavier than water, and PP or HDPE, which have a specific gravity lighter than water. If it is similar, it is easy to float on water, and when mixed with gravel, cement, and water during concrete manufacturing, there is a concern that it may not mix well while floating on the water. However, in the present invention, when recycled plastic chips, which are a mixture of PET, PP, and HDPE, are mixed with Portland cement having a specific gravity of 3.10 to 3.18 and an average of 3.15, the mixture of recycled plastic chips and Portland cement has a specific gravity greater than water and does not float on water, It has a high affinity with gravel, cement, and water that are mixed during concrete production, so that it can be mixed well.
예를 들면 비중 1.38 내외인 PET와 비중 0.90 내외인 PP와 비중 0.96 내외인 HDPE가 6:2:2의 비율로 혼합된 것이라면 그 비중은 1.20이 되며, 여기에 중량 10%의 비중 3.15인 포틀랜드 시멘트를 혼합하게 되면 그 비중은 1.395가 되고, 중량 15%의 비율로 포틀랜드 시멘트를 혼합하게 되면 그 비중은 1.493이 되어 각각 물보다 훨씬 무거운 비중이 되며, 본 발명의 모래대용품을 자갈, 시멘트 및 물과 혼합하여 콘크리트를 제조할 때 본 발명의 모래대용품이 물에 뜨지 않고 자갈, 시멘트 및 물과 용이하게 혼합될 수 있는 것이다.For example, if PET with a specific gravity of around 1.38, PP with a specific gravity of around 0.90 and HDPE with a specific gravity of around 0.96 are mixed in a ratio of 6:2:2, the specific gravity is 1.20, and Portland cement with a specific gravity of 3.15 of 10% by weight is mixed. When mixed, the specific gravity becomes 1.395, and when Portland cement is mixed at a rate of 15% by weight, the specific gravity becomes 1.493, which is much heavier than water, respectively, and the sand substitute of the present invention is mixed with gravel, cement, and water. When mixing to produce concrete, the sand substitute of the present invention does not float on water and can be easily mixed with gravel, cement and water.
본 발명에서 PET, PP 및 HDPE 혼합 파쇄물에 10~15%의 포틀랜드 시멘트를 혼합하는 또 다른 이유는 포틀랜드 시멘트가 미세한 가루 형태이어서 PET, PP 및 HDPE 혼합 파쇄물과 골고루 혼합되기 쉽고, 또 골고루 혼합되어 제조된 본 발명의 모래대용품은 품질이 비교적 균일하며, 포틀랜드 시멘트가 혼합된 것이어서 콘크리트 제조 시 섞게 되는 시멘트 및 자갈과도 친화성이 커서 용이하게 혼합될 수 있는 효과가 있다.Another reason for mixing 10-15% of Portland cement in the PET, PP and HDPE mixed crushed material in the present invention is that Portland cement is in the form of a fine powder, so it is easy to mix evenly with the PET, PP and HDPE mixed crushed material, and is mixed evenly. The sand substitute of the present invention has a relatively uniform quality, and since it is a mixture of Portland cement, it has a high affinity with cement and gravel to be mixed during concrete production, so that it can be easily mixed.
그러므로 본 발명의 모래대용품은 종래 시멘트 벽돌이나 블록 및 와이드 모노타일 등과 같은 건축용재나 원통형 흄관, 보도블록 및 암거 등과 같은 산업용재 또는 건축물이나 옹벽, 댐 등과 같은 각종 건축 및 산업용 구조물을 콘크리트로 제조 시 자갈과 함께 골재로 사용하던 모래 대신 본 발명의 모래대용품을 시멘트, 자갈 및 물과 혼합하여 제조케 됨으로써 막대한 양의 강모래나 바닷모래 또는 인공모래를 대체하여 사용할 수 있고, 대부분 폐기되던 PET, PP 및 HDPE를 재활용할 수 있게 되며, 플라스틱 폐기물로 인한 환경공해를 줄이는 데 큰 효과가 있다.Therefore, the sand substitute of the present invention can be used for construction materials such as cement bricks, blocks, and wide monotiles, industrial materials such as cylindrical hume pipes, sidewalk blocks, and culverts, or various architectural and industrial structures such as buildings, retaining walls, and dams made of concrete. Instead of sand used as an aggregate together with gravel, the sand substitute of the present invention is prepared by mixing cement, gravel, and water, so that it can be used instead of a huge amount of river sand, sea sand, or artificial sand, and PET and PP, which were mostly discarded, and HDPE can be recycled, which has a great effect on reducing environmental pollution caused by plastic waste.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020210173628A KR102660295B1 (en) | 2021-12-06 | 2021-12-06 | Substitute-sand which mixed with recycled plastic chips and cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020210173628A KR102660295B1 (en) | 2021-12-06 | 2021-12-06 | Substitute-sand which mixed with recycled plastic chips and cement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20230085030A true KR20230085030A (en) | 2023-06-13 |
| KR102660295B1 KR102660295B1 (en) | 2024-04-24 |
Family
ID=86762954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020210173628A KR102660295B1 (en) | 2021-12-06 | 2021-12-06 | Substitute-sand which mixed with recycled plastic chips and cement |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR102660295B1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990025176A (en) * | 1997-09-11 | 1999-04-06 | 하진규 | Construction aggregate using waste synthetic resin and its manufacturing method |
| JP2000335947A (en) * | 1999-03-25 | 2000-12-05 | Sekisui Chem Co Ltd | Artificial lightweight aggregate, its production and cement hardened product |
| JP2002160951A (en) * | 2000-11-21 | 2002-06-04 | Sekisui Chem Co Ltd | Artificial lightweight aggregate |
| JP2002326851A (en) * | 2001-04-27 | 2002-11-12 | Sekisui Chem Co Ltd | Plastic artificial light-weight aggregate and method for producing the same |
| JP2003137626A (en) * | 2001-11-05 | 2003-05-14 | Buiaaku Corporation Kk | Artificial sand for cement and concrete using the sand |
| JP2004161508A (en) * | 2002-11-11 | 2004-06-10 | Taiheiyo Cement Corp | Lightweight artificial sand and method of manufacturing the same |
-
2021
- 2021-12-06 KR KR1020210173628A patent/KR102660295B1/en active IP Right Grant
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990025176A (en) * | 1997-09-11 | 1999-04-06 | 하진규 | Construction aggregate using waste synthetic resin and its manufacturing method |
| JP2000335947A (en) * | 1999-03-25 | 2000-12-05 | Sekisui Chem Co Ltd | Artificial lightweight aggregate, its production and cement hardened product |
| JP2002160951A (en) * | 2000-11-21 | 2002-06-04 | Sekisui Chem Co Ltd | Artificial lightweight aggregate |
| JP2002326851A (en) * | 2001-04-27 | 2002-11-12 | Sekisui Chem Co Ltd | Plastic artificial light-weight aggregate and method for producing the same |
| JP2003137626A (en) * | 2001-11-05 | 2003-05-14 | Buiaaku Corporation Kk | Artificial sand for cement and concrete using the sand |
| JP2004161508A (en) * | 2002-11-11 | 2004-06-10 | Taiheiyo Cement Corp | Lightweight artificial sand and method of manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| KR102660295B1 (en) | 2024-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Qaidi et al. | Engineering properties of sustainable green concrete incorporating eco-friendly aggregate of crumb rubber: A review | |
| CN105777018A (en) | Foam concrete containing recycled inorganic lightweight aggregate and preparation method thereof | |
| Maneeth et al. | Utilization of waste plastic in manufacturing of plastic-soil bricks | |
| Bandodkar et al. | Pulverised PET bottles as partial replacement for sand | |
| Dharmaraj et al. | Suitability of partial replacement of pulverized plastic as fine aggegate in cement concrete | |
| Gungat et al. | Development of paver block containing recycled plastic | |
| KR20220117546A (en) | Cement brick, block and constructing or industrial materials which mixed with recycled plastic chips | |
| Habib et al. | Concrete production using recycled waste plastic as aggregate | |
| KR102660295B1 (en) | Substitute-sand which mixed with recycled plastic chips and cement | |
| WO2014007648A1 (en) | Improvements in, or relating to, aggregate materials | |
| US5635551A (en) | Compositions for use in molding products from unusable tires | |
| KR100241706B1 (en) | Structure forming composition using waste and manufacturing method thereof | |
| KR20000043359A (en) | Preparation method of wood substitute material using mixed waste synthetic resin and apparatus thereof | |
| KR20020024279A (en) | Glass Resin Ceramic (G.R.C.) composition and method for preparing the same | |
| Yadav et al. | Laboratory investigations of the properties of concrete containing recycled plastic aggregates | |
| Nili et al. | Review on the Use of Various Kinds of Debris and Demolitions in Concrete and Mortar Mixes | |
| RU2674908C2 (en) | Method for obtaining granulated bitumen | |
| Amir et al. | Plastic in brick application | |
| KR20240070998A (en) | Manufacturing method of sand substitute for concrete manufacturing | |
| JP2022504922A (en) | New Compositions and Methods for Producing Plastic Compositions | |
| KR960011322B1 (en) | Method for concrete composite materials using waste plastic | |
| JPH10193358A (en) | Crushed plastic material for civil engineering and construction | |
| AU2013219194A1 (en) | A rigid composite material | |
| JP2001089209A (en) | Method of production for artificial aggregate | |
| JP2001261425A (en) | Sulfur composition molding raw material and its manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| E902 | Notification of reason for refusal | ||
| E701 | Decision to grant or registration of patent right |