KR0164271B1 - Shortening period method of processing phc pile-made - Google Patents

Shortening period method of processing phc pile-made Download PDF

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Publication number
KR0164271B1
KR0164271B1 KR1019960026679A KR19960026679A KR0164271B1 KR 0164271 B1 KR0164271 B1 KR 0164271B1 KR 1019960026679 A KR1019960026679 A KR 1019960026679A KR 19960026679 A KR19960026679 A KR 19960026679A KR 0164271 B1 KR0164271 B1 KR 0164271B1
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South Korea
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hours
time
curing
steam
phc pile
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KR1019960026679A
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Korean (ko)
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KR980008487A (en
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허상욱
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이재복
동양시멘트주식회사
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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 단축함으로써 생산성을 향상시킬수 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 상향조정하며, 시료의 배합을 조정하여 증기양생공정 시간을 7시간으로 단축함으로써 생산성을 향상시킬 수 있음을 특징으로 하는 PHC PILE 증기양생공정시간 단축방법.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 manufacturing process of PHC PILE. In the manufacturing process of PHC PILE, steam to change the curing chamber To increase the height of the curing room by 1.2m, and to eliminate the steam supply shortage caused by the expansion of the curing room, the steam supply pipe was expanded from 32mm in diameter to 50mm in diameter, and the pretreatment time was adjusted for 4 hours to adjust the curing time. Reduce the temperature rise time from 3 hours, 2 hours, 2 hours to 4 hours and maximum temperature time of about 5 hours, respectively, and increase the maximum temperature from 80 ° C to 85 ° C. A method for shortening the PHC PILE steam curing process time, which can be improved by reducing the productivity to 7 hours.

Description

PHC PILE 증기양생 공정시간 단축방법How to shorten PHC PILE steam curing process time

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

PHC PILE을 제조하는 방법으로는 AC(Auto clave)방식과 NAC(Non-Auto clave)방식이 있는데, 주로 NAC방식을 이용하며, NAC방식은 최근에 개발된 기술로서 AC방식에 있는 2차 양생공정이 필요하지 않고, 기존의 PC PILE 제조방식과 동일하게 상압 증기양생만으로 고강도 PHC PILE(800Kgf/㎠)을 제조하는 방법으로 원재료에 무수석고계의 혼합재를 첨가하고, 고성능 감수제를 사용하여 물-시멘트비를 낮추어서 상압 증기양생만을 행하여 혼합재와 수화생성물이 반응하므로서 침상의 치밀한 에트링자이트(Ettringite)를 생성시켜 고강도화를 기하며, 이렇게 제조된 PHC PILE은 고온 고압에서 양생하지 않으므로 기존의 제품에 비하여 PC강재의 응력손실량이 적고 수화조직이 치밀하여 화학적 저항성 등의 콘크리트 내구성이 뛰어난 이점이 있었다. 이 NAC방식에서의 증기양생공정은 PHC PILE의 강도를 숙성시키는 공정으로서, 시멘트 수화물과 무수석고계의 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.The manufacturing method of PHC PILE includes AC (Auto clave) method and NAC (Non-Auto clave) method, mainly using NAC method, NAC method is a recently developed technology, secondary curing process in AC method In the same way as conventional PC PILE manufacturing method, high-pressure PHC PILE (800Kgf / ㎠) is produced by using atmospheric steam curing alone, and anhydrous gypsum-based mixture is added to raw materials, and water-cement ratio By lowering the pressure and performing atmospheric steam curing only, the mixture and the hydration product react to produce needle-shaped dense ettringite to increase the strength. The amount of stress loss of the steel is small and the hydration structure is dense, which has the advantage of excellent concrete durability such as chemical resistance. The steam curing process in this NAC method is a process of ripening the strength of PHC PILE. The pretreatment time, which is the time required for the condensation of the cement hydrate and the anhydride-based mixture to finish, and the temperature required to reach the maximum temperature It is composed of time and the maximum temperature curing time in which the high strength of the cement is accelerated due to the acceleration of hydration of the cement, which takes the most time in the manufacturing process of the PHC PILE and takes 13 hours. There was a disadvantage of poor productivity.

상기의 단점을 해결하기 위하여, 증기양생공정 시간을 최소 10시간이하로 단축하여 1일 2교대 근무가 가능하도록 하여 생산성을 향상시키는 방법을 제공하는데 본 발명의 목적이 있다.In order to solve the above disadvantages, it is an object of the present invention to provide a method for improving productivity by reducing the steam curing process time to at least 10 hours or less to enable two shifts per 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 achieve the above object, the present invention changes the temperature raising time and the maximum temperature curing time of the steam curing room and curing time, and adjusts the formulation of the material to correspond to 110% of the required quality standard of compressive strength (800Kgf / ㎠). It is configured to improve productivity by shortening curing time to show strength expression rate.

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

양생시간이 길어지는 요인을 보면 양생실 크기가 작고 증기공급이 부족하며 승온시간이 길고 양생온도가 낮으며 최고온도시간이 길어서 압축강도발현율이 110% 이상을 유지하는 것이다.Longer curing time is due to the small size of the curing room, lack of steam supply, long heating time, low curing temperature, and long maximum temperature time, maintaining the compressive strength expression rate over 110%.

본 발명은 양생실에 변화를 주기 위해 증기양생실의 높이를 1.2m로 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 to 1.2m in order to change the curing chamber, and to expand the steam supply pipe from 32mm in diameter to 50mm in diameter in order to eliminate the steam supply shortage caused during expansion of the curing chamber, curing To adjust the time, reduce pretreatment time to 4 hours, temperature rise time to 4 hours, and maximum temperature time from approximately 5 hours to 3 hours, 2 hours and 2 hours, respectively, and increase the maximum temperature from 80 ℃ to 85 ℃. .

또한 상기의 방법에 의하면 압축강도발현율이 110%보다 높은 123.3%를 나타내므로 재료의 배합조정을 아래와 같이 실시하여 공정에 적용한다.In addition, according to the above method, the compressive strength expression rate is 123.3% which is higher than 110%.

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 compressive strength expression rate is also suitable for the expression rate of appropriate quality, so that two shifts per day are possible, thereby improving productivity.

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 PHC PILE, the height of steam curing chamber is extended by 1.2m to change the curing chamber, and the steam supply pipe is changed from 32mm in diameter to 50mm in order to solve the shortage of steam supply caused by expansion of the curing chamber. In order to adjust the curing time, the pretreatment time is reduced to 4 hours, the temperature rise time to 4 hours, the maximum temperature time from about 5 hours to 3 hours, 2 hours and 2 hours, respectively, and the maximum temperature is reduced from 80 ℃ to 85 ℃. The method for shortening the PHC PILE steam curing process time, characterized in that the productivity can be improved by reducing the steam curing process time to 7 hours by adjusting the formulation of the sample.
KR1019960026679A 1996-07-02 1996-07-02 Shortening period method of processing phc pile-made KR0164271B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190135220A (en) 2018-05-28 2019-12-06 영풍파일(주) Facility for Manufacturing Concrete Pile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190135220A (en) 2018-05-28 2019-12-06 영풍파일(주) Facility for Manufacturing Concrete Pile

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