KR100836598B1 - A composition of concrete mortar which used waste concrete - Google Patents
A composition of concrete mortar which used waste concrete Download PDFInfo
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- KR100836598B1 KR100836598B1 KR20070054348A KR20070054348A KR100836598B1 KR 100836598 B1 KR100836598 B1 KR 100836598B1 KR 20070054348 A KR20070054348 A KR 20070054348A KR 20070054348 A KR20070054348 A KR 20070054348A KR 100836598 B1 KR100836598 B1 KR 100836598B1
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- 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
- C04B18/16—Waste materials; Refuse from building or ceramic industry
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- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/06—Quartz; Sand
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- 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
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
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- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
- C04B24/18—Lignin sulfonic acid or derivatives thereof, e.g. sulfite lye
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- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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- 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
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Road Paving Structures (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
폐 콘크리트는 주로 재개발 또는 재건축에 의한 노후 건물의 해체 등의 경우에 다량 발생하고 있으며, 폐 아스팔트는 도로의 정비 과정에서 다량 발생하고 있다.Waste concrete is mainly generated in the case of dismantling of old buildings by redevelopment or reconstruction, and waste asphalt is generated in the process of road maintenance.
상기의 페 콘크리트나 폐 아스팔트의 대부분은 간척지 등의 매립에 사용되든지 또는 쓰레기 매립장에 버려지는 상태였으나, 최근에는 재생골재(순환골재)나 재생 모래로 재활용하고자 하는 연구가 활발하게 진행되고 있고, 이에 따라 본 발명자는 폐 아스팔트 분쇄물을 이용한 아스콘을 제조하는 방법을 국내특허출원 제10-2006-83940호를 개발한 바 있으며, 또한 폐 콘크리트로부터 순환골재를 재생하여 콘크리트 시공시 골재로 사용하는 방법을 개발하여 국내특허출원 제10-2006-90901호로 출원하였으며, 흙을 포장재의 재료로 이용하는 방법을 개발하여 국내특허출원 제2007-17668호로 출원한 바 있다. 이들 폐 아스팔트나 폐 콘크리트를 분쇄하여 재생한 자갈이나 모래로 콘크리트 모르타르를 제조하여 도로포장이 나 공장 및 지하주차장 등의 바닥용 콘크리트로 재활용하고 있으나, 폐 콘크리트를 처리하는 과정에서 발생하는 가루형태의 석분이나 폐콘크리트의 채취과정에서 묻어나는 토분을 재활용하는 기술은 아직 개발된 바 없어, 이들 석분이나 토분(이하 "석분 등"이라 합니다)은 쓰레기장이나 매립장에 폐기처분하고 있는 실정이다. 그러나 상기의 석분 등을 매립하기 위하여 매립장으로 운반하는데 소요되는 운반비용이나, 폐기물처리 비용의 과다로 대부분의 처리장에서는 이를 그대로 방치함으로써 분진 등에 의한 환경오염을 야기하여 처리장에서 일하는 인부들의 건강을 해치는 문제가 발생했다. Most of the above-mentioned waste concrete and waste asphalt have been used in landfills such as reclaimed land or dumped in landfills, but recently, researches to recycle recycled aggregates (circulating aggregates) or recycled sand have been actively conducted. Accordingly, the present inventors have developed Korean Patent Application No. 10-2006-83940 for a method of manufacturing ascon using waste asphalt pulverized, and also recycled recycled aggregate from waste concrete and use it as aggregate when constructing concrete. It was developed and filed in Korean Patent Application No. 10-2006-90901, and developed a method of using soil as a packaging material and filed in Korean Patent Application No. 2007-17668. Concrete mortar is produced from the gravel or sand that is recycled by crushing these waste asphalt or waste concrete, and recycled into floor concrete such as road pavement, factory, and underground parking lot. No technology has yet been developed to recycle soil powder from the collection of stone powder or waste concrete, and these powders or soil powder (hereinafter referred to as "stone powder") are being disposed of in waste or landfills. However, due to the excessive cost of transporting to the landfill site to reclaim the stone powder, etc., or waste disposal cost, most of the treatment plants are left as it is, causing environmental pollution by dust and the like, which damages the health of the workers working at the processing plant. happened.
본 발명은 폐 콘크리트나 폐 아스팔트로부터 순환골재 또는 모래를 재생하는 과정에서 발생되는 부산물인 석분 등을 콘크리트 모르타르의 조성 성분으로 재활용하는 콘크리트 모르타르의 조성물에 관한 것으로, 상세하게는 폐 콘크리트 또는 폐 아스팔트를 처리하는 과정에서 부생하는 석분 등을 콘크리트 모르타르에 배합하여 재활용함과 동시에 환경오염을 줄이고 콘크리트 모르타르의 제조원가를 절약하기 위한 것으로 구체적으로는 먼저, 폐 콘크리트 등의 분쇄 시 발생되는 석분 등에 함유된 이물질을 제거하고, 이들 석분 등을 300 - 350 매쉬 이하로 미세하게 분쇄하여 자갈 100 중량부에 대하여 시멘트 10 - 20 중량부, 모래 25 - 30 중량부, 석분 등과 고로슬래그 4 - 8 중량부 및 혼화제 0.08 - 0.1 중량부의 비율로 배합하여 콘크리트 모르타르을 제조할 경우 오히려 기존의 콘크리트 모르타르에 비하여 콘크리트의 강도가 증가하는 것을 발견하고 본 발명을 완성하게 되었다. The present invention relates to a composition of concrete mortar that recycles stone powder, which is a by-product generated in the process of recycling recycled aggregate or sand from waste concrete or waste asphalt, as a component of concrete mortar, and specifically, waste concrete or waste asphalt. In order to reduce the environmental pollution and reduce the manufacturing cost of concrete mortar by mixing and recycling the by-product stone powder to concrete mortar, specifically, first, foreign substances contained in stone powder generated during the crushing of waste concrete, etc. And finely pulverize these powders to 300-350 mesh or less, 10 to 20 parts by weight of cement, 25 to 30 parts by weight of sand, 4 to 8 parts by weight of stone powder and blast furnace slag, and admixtures 0.08- Concrete mortar can be prepared by blending in a proportion of 0.1 parts by weight. Wu rather thereby completing the present invention and found that the concrete strength increases compared to the conventional concrete mortar.
본 발명은 폐 콘크리트나 폐 아스팔트로부터 순환골재 또는 모래를 재생하는 과정에서 발생되는 부산물인 석분 등을 콘크리트 모르타르의 조성 성분으로 재활용함으로써, 분진 등으로 인한 환경오염을 줄일 수 있을 뿐만 아니라 폐기물 처리 비용을 절약함과 동시에 모래나 골재의 사용량을 줄일 수 있는 콘크리트 모르타르 조성물을 제공함을 그 목적으로 한다.The present invention recycles stone powder, which is a by-product generated in the process of recycling recycled aggregate or sand from waste concrete or waste asphalt, as a component of concrete mortar, thereby reducing environmental pollution caused by dust and the like, and reducing waste disposal costs. It is an object of the present invention to provide a concrete mortar composition that can reduce the amount of sand or aggregate while saving.
본 발명의 다른 목적은, 콘크리트 모르타르의 조성성분으로 고로슬래그를 첨가함으로써 콘크리트의 강도를 증가시킨 콘크리트 모르타르의 조성물을 제공함에 있다.Another object of the present invention is to provide a composition of concrete mortar in which the strength of concrete is increased by adding blast furnace slag as a composition component of concrete mortar.
상기 목적을 달성하기 위해 연구를 거듭한 결과 폐 콘크리트를 처리하는 과정에서 부산물로 발생하는 석분 등을 300 - 350매쉬 이하로 미세하게 분쇄한 후 일정량의 고로슬래그를 첨가하여 이들을 시멘트의 대체재료로 사용할 경우, 유동성 및 기공 누적량이 감소되어 치밀한 조직을 갖추어 일반적인 콘크리트 모르타르에 비하여 강도가 증가하는 것을 확인하였다.As a result of repeated studies to achieve the above object, finely crushed stone powder generated as a by-product in the process of treating waste concrete to 300-350 mesh or less, and a certain amount of blast furnace slag is added to use them as a substitute material for cement. In this case, it was confirmed that the fluidity and pore accumulation were reduced to have a dense structure and the strength was increased compared to that of the general concrete mortar.
먼저, 상기 석분 등에 섞여있는 유리, 플라스틱 나무 등을 분리 제거한 후 집진기로 채취한다. 집진기로 채취시 직경 7mm정도의 크기 석분 등이 주로 채취된다.First, the glass, plastic wood, etc. mixed with the stone powder are separated and removed, and then collected by a dust collector. When collecting with a dust collector, the size of powder of about 7mm diameter is mainly collected.
상기 채취된 석분 등과 제철소에서 발생하는 고로슬래그를 분쇄기에서 300 - 350매쉬로 미세 분말화 시킨 후 이들을 3시간 내지 6시간 배합기에서 혼합한다.The powdered blast furnace slag generated in the steel mill and the like is finely powdered in a mill to 300-350 mesh and then mixed in a blender for 3 to 6 hours.
석분 등과 고로슬래그를 시멘트 분말과 같은 크기로 분말화함으로써 시멘트와 혼화가 잘 이루어지도록 한다. 석분 등과 고로슬래그의 크기가 300매쉬 이하인 경우에는 기공이 커서 조직이 치밀하지 못하며, 350매쉬 이상인 경우에는 분쇄 비용이 많이 소요되며, 입자의 반응성이 커지고 분말도가 높아짐에 따라 응결 경화 후의 수축이 크게 되며 균열발생의 가능성을 크게 하는 요인이 되고 풍화를 촉진하는 단점이 있다. 따라서 이들 성분들을 너무 미세하게 분쇄할 경우 물과의 접촉면적이 크기 때문에 수화도 빨라 콘크리트의 단기강도는 증가하나, 장기강도 및 내구성면에서 콘크리트 구조물의 내부조직이 초기의 빠른 수화 때문에 포로시티(공극)가 증가하여 조직이 치밀하지 못한 단점이 있다. Stone powder and blast furnace slag are powdered to the same size as cement powder so that they are well mixed with cement. If the size of stone powder and blast furnace slag is less than 300 mesh, the pore is large and the tissue is not dense. If it is more than 350 mesh, the grinding cost is high. It is a factor that increases the possibility of cracking and promotes weathering. Therefore, when these components are too finely ground, the hydration is faster due to the large contact area with water, which increases the short-term strength of the concrete.However, in terms of long-term strength and durability, the internal structure of the concrete structure causes the porosity due to early rapid hydration. ) Has the disadvantage that the organization is not dense.
고로슬래그는 슬래그 자체가 Ca2+를 용출시키므로 포틀랜드시멘트에서 생성된 수산화칼슘을 소비하기 위해서는 다른 재료보다 혼합률을 크게 할 필요가 있다. Since blast furnace slag itself elutes Ca 2+ , it is necessary to increase the mixing ratio of other materials in order to consume the calcium hydroxide produced in the Portland cement.
통상의 고로슬래그 미분말의 반응속도는 보통 시멘트보다 낮고 저열계의 포틀랜드시멘트보다는 크다. 고로슬래그는 가수 직후 거의 반응하지 않고 입자 표면에 수화물을 생성하지 않으므로 시멘트 입자 간에 발생하는 마찰력을 저감시켜 유동성 개선에 유효하다. 특히, 고로 슬래그를 사용할 경우 해수에 대한 저항성에 우수하며, 수화반응에 의해 생기는 조직이 치밀하다.The reaction rate of conventional blast furnace slag fine powder is usually lower than that of cement and higher than that of low heat system Portland cement. Since blast furnace slag reacts hardly after watering and does not produce hydrate on the particle surface, it is effective in improving fluidity by reducing frictional force generated between cement particles. In particular, when blast furnace slag is used, it is excellent in resistance to seawater, and the tissue produced by the hydration reaction is dense.
본 발명에서 사용되는 석분과 토분은 그 비율에 특별한 제한이 없고, 석분 등과 고로슬래그는 1 : 1의 비율로 혼합하는 것이 바람직하다.Stone powder and earth powder used in the present invention are not particularly limited in their ratio, and stone powder and blast furnace slag are preferably mixed in a ratio of 1: 1.
본 발명에서는 혼화제를 0.08 - 0.1 중량부 사용한다. 혼화제는 시멘트, 물, 골재 이외의 재료로서 모르타르, 콘크리트에 특별한 품질을 부여하거나 성질을 개선하기 위하여 첨가되는 것으로 본 발명에서는 유동성을 증가시키기 위하여 리그닌설폰산 등의 혼화제를 사용하는 것이 바람직하다.In this invention, 0.08-0.1 weight part of admixtures are used. The admixture is added to impart a special quality or improve properties to mortar and concrete as materials other than cement, water and aggregate. In the present invention, an admixture such as lignin sulfonic acid is preferably used to increase fluidity.
리그닌설폰산을 첨가할 경우 수중에서 설폰산 음이온과 칼슘 양이온으로 전리하여 강한 음이온활성을 나타내고 응집상태의 입자 사이에 물과 공기를 유통시켜 시멘트에 유동성을 부여하게 된다. When lignin sulfonic acid is added, it is ionized by sulfonic acid anion and calcium cation in water, showing strong anionic activity, and imparting fluidity to cement by circulating water and air between aggregated particles.
본 발명의 콘크리트 모르타르는 실험결과 폐 콘크리트에서 생성된 석분과 토분의 사용에 따른 유동성 및 강도가 저하되는 단점을 혼화제 및 고로슬래그를 첨가함으로써 일반적인 시멘트 모르타르에 비하여 유동성 및 강도가 뛰어난 것으로 나타났다.Experimental results of the concrete mortar of the present invention was found to be excellent in fluidity and strength compared to the general cement mortar by the addition of admixtures and blast furnace slag to the disadvantage that the fluidity and strength is reduced according to the use of stone powder and soil powder produced in the waste concrete.
본 발명에 사용되는 콘크리트 모르타르의 조성비율은 다음과 같다. 자갈 100 중량부에 대하여 시멘트 10 - 20중량부, 모래 25 - 30 중량부, 석분 등과 고로슬래그 4 - 8중량부 및 혼화제 0.08 - 0.1 중량부의 비율로 배합하여 제조한다. The composition ratio of the concrete mortar used in the present invention is as follows. 10 to 20 parts by weight of cement, 25 to 30 parts by weight of sand, 4 to 8 parts by weight of blast furnace slag and 0.08 to 0.1 parts by weight of admixture are prepared.
실시예Example : 본 발명에 의한 시멘트 모르타르의 제조 : Preparation of Cement Mortar according to the Present Invention
폐 콘크리트로부터 순환골재 또는 모래를 재생하는 과정에서 발생되는 부산물인 석분 등은 포항 소재 (주)한동재생공사로부터 채취하였고, 고로슬래그는 포항 소재 (주)포항제철에서 수집하여 이들을 1 : 1의 비율로 혼합하여 세라믹 볼 밀(ceramic ball mill)로 7 -8시간 동안 320매쉬 이하의 크기로 분쇄한 후 혼합기에서(배합기) 4시간 동안 완전히 혼합시킨다. 자갈 100중량부에 대하여 상기의 석분 등과 고로슬래그 5중량부, 시멘트 20중량부, 모래 30중량부 및 혼화제로 리그닌설폰산 0.1 중량부를 배합하여 콘크리트 모르타르를 제조하였다. Stone powder, which is a by-product generated from recycling recycled aggregate or sand from waste concrete, was collected from Handong Reclamation Co., Ltd. in Pohang, and blast furnace slag was collected at Pohang Steel Co., Ltd. The mixture is ground in a ceramic ball mill (ceramic ball mill) for 7-8 hours to a size of 320 mesh or less and then thoroughly mixed in a mixer (mixer) for 4 hours. Concrete mortar was prepared by mixing 5 parts by weight of blast furnace slag, 20 parts by weight of cement, 30 parts by weight of sand, and 0.1 parts by weight of lignin sulfonic acid with admixtures based on 100 parts by weight of gravel.
< 실험예 >Experimental Example
실시예의 조성을 갖는 콘크리트 모르타르 조성물을 이용하여 10cm ×10cm ×10cm 크기의 시험체를 제작하여 양생한 후 7일 경과시와 30일 경과시에 KSL 5105(수경성 시멘트 모르타르의 압축강도 시험)에 준하여 압축강도를 측정하였고, 또한 일반적인 포틀랜드 시멘트의 모르타르 조성물 및 본 발명에서 고로슬래그를 사용하지 않은 콘크리트 모르타르 조성물로 동일 크기의 시험체를 제작하여 각각의 시험체에 대한 압축강도를 측정한 결과는 표 1과 같다.The compressive strength was measured in accordance with KSL 5105 (compressive strength test of hydraulic cement mortar) after 7 days and 30 days after fabrication and curing of a 10cm × 10cm × 10cm sized specimen using the concrete mortar composition having the composition of Example. In addition, the test specimens of the same size were prepared from the general mortar composition of portland cement and the concrete mortar composition without using the blast furnace slag in the present invention, and the compressive strength of each specimen was measured.
[표 1]TABLE 1
상기 표 1에서 대체물은 석분 등 및 고로슬래그를 의미하고 숫자는 시멘트 대체율로 대체물/ 시멘트+대체물의 백분율을 의미한다. 상기의 표에서 알 수 있듯이 고로슬래그를 배합한 실시예의 모르타르 조성물의 경우 통상의 콘크리트 조성물 보다도 압축강도가 뛰어난 것으로 나타났으며, 시멘트 대체물의 대체율이 20%인 경 우에 가장 뛰어난 것으로 나타났다.In Table 1, the substitutes refer to stone powder and blast furnace slag, and the numbers refer to percentages of substitutes / cement + replacements as cement replacement rates. As can be seen from the above table, the mortar composition of the embodiment incorporating the blast furnace slag was found to have superior compressive strength than the conventional concrete composition, and was found to be most excellent when the replacement rate of cement substitute was 20%.
위에서 설명한 바와 같이 본 발명은, 폐콘크리트 등으로부터 순환골재 및 모래의 제조과정에서 부생되는 석분 등을 고로슬래그와 함께 콘크리트 모르타르의 제조 시 재활용함으로써 콘크리트 모르타르의 환경오염을 예방할 수 있고, 운반 및 폐기물처리 비용을 줄임과 동시에 모르타르 시공비용을 절감할 수 있을 뿐만 아니라 높은 강도의 콘크리트를 제공함으로써 콘크리트의 사용기간을 연장할 수 있는 효과가 있다.As described above, the present invention can prevent the environmental pollution of concrete mortar by recycling the stone powder by-produced in the manufacturing process of recycled aggregate and sand from waste concrete together with the blast furnace slag in the production of concrete mortar, transport and waste treatment At the same time, the cost of mortar construction can be reduced while providing high strength concrete, thereby extending the service life of the concrete.
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CN106587689A (en) * | 2016-12-15 | 2017-04-26 | 攀枝花环业冶金渣开发有限责任公司 | Heat-resistant concrete manufacturing method |
CN107584633A (en) * | 2017-09-29 | 2018-01-16 | 汕头市宏基混凝土构件有限公司 | A kind of autoclave condensation water is applied to the method for concrete tubular pile production |
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