KR980008487A - PHC PILE Method to shorten steam curing process time - Google Patents

PHC PILE Method to shorten steam curing process time Download PDF

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Publication number
KR980008487A
KR980008487A KR1019960026679A KR19960026679A KR980008487A KR 980008487 A KR980008487 A KR 980008487A KR 1019960026679 A KR1019960026679 A KR 1019960026679A KR 19960026679 A KR19960026679 A KR 19960026679A KR 980008487 A KR980008487 A KR 980008487A
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South Korea
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hours
time
phc pile
steam curing
steam
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KR1019960026679A
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Korean (ko)
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KR0164271B1 (en
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허상욱
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이재복
동양시멘트 주식회사
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    • 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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/40—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material
    • B28B7/46—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material for humidifying or dehumidifying
    • 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
    • B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
    • B28B11/245—Curing concrete articles
    • 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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/40—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material
    • B28B7/42—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material for heating or cooling, e.g. steam jackets, by means of treating agents acting directly on the moulding material

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

본 발명은 PHC PILE의 제조공정에 있어서 증기양생 공정시간을 단축함으로서 생산성을 향상시킬 수 있는 PHC PILE 증기양생 공정시간 단축방법에 관한 것으로, PHC PILE의 제조공정에 있어서, 양생실에 변화를 주기 위해 증기양생실의 높이를 1,2m 확장하고, 양생실 확장시 발생되는 증기공급 부족현상을 해소하기 위하여 증기공급 파이프를 직경 32mm에서 직경 50mm로 확장하고, 양생시간을 조절하기 위하여 전치양생시간을 4시간, 승온시간을 4시간, 최고온도시간 약 5시간에서 각각 3시간, 2시간, 2시간으로 단축하고, 최고온도를 80℃에서 85℃로 상향 조정하며, 시료의 배함을 조정하여 증기양생공정 시간을 7시간으로 단축함으로써 생산성을 향상시킬 수 있음을 특징으로 하는 PHC PILE 증기양생공정 시간 단축방법.The present invention relates to a method for shortening a PHC PILE steam curing process time that can improve productivity by shortening a steam curing process time in the process of manufacturing a PHC pile. In a manufacturing process of a PHC pile, To extend the height of the steam curing chamber by 1m and extend the diameter of the steam supply pipe from 32mm to 50mm in order to eliminate the shortage of steam supply caused by expansion of the curing chamber, Hour, the temperature rise time to 4 hours, the maximum temperature time to about 5 hours to 3 hours, 2 hours and 2 hours respectively, and the maximum temperature was adjusted from 80 ° C to 85 ° C. And the productivity can be improved by shortening the time to 7 hours. A method for shortening the process time of the PHC PILE steam curing process.

Description

PHC PILE 증기양생 공정시간 단축방법PHC PILE Method to shorten steam curing process time

본 발명은 PHC PILE의 제조공정에 있어서 증기양생 공정시간을 단축함으로써 생산성을 향상시킬 수 있는 PHC PILE 증기양생 공정시간 단축방법에 관한 것이다.The present invention relates to a method for shortening the PHC PILE steam curing process time, which can improve productivity by shortening the steam curing process time in the PHC PILE manufacturing process.

PHC PILE을 제조하는 방법으로는 AC(Auto clave) 방식과 NAC(Non-Auto clave)방식이 있는데, 주로 NAC방식을 이용하며, NAC방식은 최근에 개발된 기수로서 AC방식에 있는 2차 양생공정이 필요하지 않고, 기존의 ㅍ 제조방식과 동일하게 상압 증기양생만으로 고강도 PHC PILE(800KgF/㎠)을 제조하는 방법으로 원재로에 무수석고계의 혼합재를 첨가하고, 고성능 감수제를 사용하여 물-시멘트비를 낮추어서 상압 증기양생만을 행하여 혼합재와 수화생성물이 반응하므로서 침상의 치밀한 에트링자이(Ettringite)를 생성시켜 고강도화를 기하며, 이렇게 제조된 PHC PILE은 고온 고압에서 양생하지 않으므로 기존의 제품에 비하여 PC강재의 응력 손실량이 적고 수화조직이 치밀하여 화학적 저항성 등의 콘크리트 내구성이 뛰어난 이점이 있었다. 이 NAC방식에서의 증기 양생공정은 PHC PILE의 강도를 숙성시키는 공정으로서, 시멘트 수화물과 무수석고ㅖ의 혼합재의 응결이 종료되는데 필요한 시간인 전치양생시간과, 최고온도에 도달하는 데 필요한 시간인 승온시간, 그리고 시멘트 수화가 촉진되어 고강도화가 진행되는 최고온도양생시간으로 이루어져 있으므로 PHC PILE의 제조공정 중 가장 많은 시간을 차지하며 13시간이 소요되므로 투입형틀회전과 관련하여 1일 2교대 근무가 불가능하여 생산성이 떨어지는 단점이 있었다.PHC PILE is manufactured by AC clave method and NAC method. It mainly uses NAC method. NAC method is a recently developed nose method, (800KgF / ㎠) is produced by using atmospheric steam curing just as in the conventional production method, and a mixture of anhydrous gypsum based materials is added to the raw material, and a water-cement ratio The PHC PILE does not cure at high temperatures and high pressures. Therefore, it is possible to produce PC steels (for example, And the durability of the concrete such as chemical resistance is excellent. The steam curing process in the NAC system is a process of aging the strength of the PHC PILE and is a process for curing the mixture of cement hydrate and anhydrite gypsum, Time and cement hydration are accelerated and the highest temperature curing time is progressed. Therefore it takes 13 hours to process the PHC pile, so it is impossible to work two shifts per day There was a disadvantage that the productivity was poor.

상기의 단점을 해결하기 위하여, 증기양생공정 시간을 최소 10기간 이하로 단축하여 1일 2교대 근무가 가능하도록 하여 생산성을 향상시키는 방법을 제공하는 데 그 목적이 있다.In order to solve the above-mentioned disadvantages, it is an object of the present invention to provide a method for improving productivity by shortening a steam curing process time to at least 10 periods or less and enabling two shifts a day.

상기의 목적을 달성하기 위하여 본 발명은 증기양생실과 양생시간의 승온시간 및 최고온도 양생시간에 변화를 주고 재료의 배합을 조정하여 압축강도의 필요 품질기준(800Kgf/㎠)의 110%에 해당하는 강도발현율을 보이도록 양생시간을 단축하여 생산성을 향상시킬 수 있도록 구성되어진다.In order to accomplish the above object, the present invention provides a method for adjusting the composition of a steam curing chamber and a curing time to a temperature rise time and a maximum temperature curing time, So that the curing time is shortened so as to show the strength development rate, thereby improving the productivity.

본 발명을 자세히 설명하면 다음과 같다.The present invention will be described in detail as follows.

양생시간이 길어지는 요인을 보면 양생실 크기가 작고 증기공급이 부족하며 승온시간이 길고 양생온도가 낮으며 최고 온도시간이 길어서 압축강도발현율이 110% 이상을 유지하는 것이다.The longer the curing time, the smaller the curing room size, the less steam supply, the longer the temperature rise time, the lower the curing temperature, and the longer the maximum temperature time, the more the compressive strength generation rate is maintained at 110% or more.

본 발명은 양생실에 변화를 주기 위해 증기양생실의 높이를 1.2m 확장하고, 양생실 확장시 발생되는 증기공급 부족현상을 해소하기 위하여 증기공급 파이프를 직경 32mm에서 직경 50mm로 확장하고, 양생시간을 조절하기 위하여 전치양생시간을 4시간, 승온시간을 4시간, 최고온도시간 약 5시간에서 각각 3시간, 2시간, 2시간으로 단축하고, 최고온도를 80℃에서 85℃로 상향조정한다.The present invention extends the height of the steam curing chamber by 1.2 m in order to change the curing chamber and extends the steam supply pipe from 32 mm in diameter to 50 mm in diameter in order to solve the shortage of steam supply caused by expansion of the curing chamber, , The maximum curing time is set to 4 hours, the temperature rise time is set to 4 hours, the maximum temperature time is set to 5 hours, and the maximum temperature is set to 80 ° C to 85 ° C.

또한 상기의 방법에 의하면 압축강고발현율이 110%보다 높은 23.3%를 나타내므로 재료의 배합조정을 아래와 같이 실시하여 공정에 적용한다.Also, according to the above method, the compression strength ratio is 23.3%, which is higher than 110%. Therefore, the composition adjustment of the material is applied to the process as follows.

상기의 방법에 의하면 증기양생공정 시간이 7시간으로 단축되고 압축강도발현율도 적정품질의 발현율에 적합하여 1일 2교대 근무가 가능하므로 생산성이 향상되는 효과가 있다.According to the above method, the steam curing process time is shortened to 7 hours, and the compression strength generation rate is also suitable for the production rate of proper quality, so that the productivity can be improved because two shifts can be performed per day.

Claims (1)

PHC PILE의 제조공정에 있어서, 양생실에 변화를 주기 위해 증기양생실의 높이를 1.2m 확장하고, 양생실 확장시 발생되는 증기공급 부족현상을 해소하기 위하여 증기공급 파이프를 직경 32mm에서 직경 50mm로 확장하고, 양생시간을 조절하기 위하여 전치양생시간을 4시간, 승온시간을 4시간, 최고온도시간 약 5시간에서 각각 3시간, 2시간, 2시간으로 단축하고, 최고온도를 80℃에서 85℃로 상향조정하며, 시료의 배합을 조정하여 증기양생공정 시간을 7시간으로 단축함으로써 생산성을 향상시킬 수 있음을 특징으로 하는 PHC PILE 증기양생공정 시간 단축방법.In the manufacturing process of the PHC PILE, in order to change the curing room, the height of the steam curing chamber is extended by 1.2 m and the steam supply pipe is changed from a diameter of 32 mm to a diameter of 50 mm The curing time was shortened to 4 hours, the temperature rise time was 4 hours, the maximum temperature time was about 5 hours to 3 hours, 2 hours and 2 hours respectively, and the maximum temperature was changed from 80 ° C to 85 ° C And the productivity of the PHC PILE steam curing process can be shortened by adjusting the mixing ratio of the sample to shorten the steam curing process time to 7 hours. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960026679A 1996-07-02 1996-07-02 Shortening period method of processing phc pile-made KR0164271B1 (en)

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KR0164271B1 KR0164271B1 (en) 1998-12-15

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KR102061898B1 (en) 2018-05-28 2020-02-20 영풍파일(주) Facility for Manufacturing Concrete Pile

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