• 제목/요약/키워드: Estimating Compressive Strength

검색결과 126건 처리시간 0.036초

배합 인자를 고려한 Machine Learning Algorithm 기반 콘크리트 압축강도 추정 기법에 관한 연구 (A Study on the Estimation Method of Concrete Compressive Strength Based on Machine Learning Algorithm Considering Mixture Factor)

  • 이승준;이한승
    • 한국건축시공학회:학술대회논문집
    • /
    • 한국건축시공학회 2017년도 춘계 학술논문 발표대회
    • /
    • pp.152-153
    • /
    • 2017
  • In the construction site, it is necessary to estimate the compressive strength of concrete in order to adjust the demolding time of the form, and establish and adjust the construction schedule. The compressive strength of concrete is determined by various influencing factors. However, the conventional method for estimating the compressive strength of concrete has been suggested by considering only 1 to 3 specific influential factors as variables. In this study, six influential factors (Water, Cement, Fly ash, Blast furnace slag, Curing temperature, and humidity) of papers opened for 10 years were collected at three conferences in order to know the various correlations among data and the tendency of data. After using algorithm of various methods of machine learning techniques, we selected the most suitable regression analysis model for estimating the compressive strength.

  • PDF

Hidden Layer의 개수가 Deep Learning Algorithm을 이용한 콘크리트 압축강도 추정 모델의 성능에 미치는 영향에 관한 기초적 연구 (A Basic Study on the Effect of Number of Hidden Layers on Performance of Estimation Model of Compressive Strength of Concrete Using Deep Learning Algorithms)

  • 이승준;이한승
    • 한국건축시공학회:학술대회논문집
    • /
    • 한국건축시공학회 2018년도 춘계 학술논문 발표대회
    • /
    • pp.130-131
    • /
    • 2018
  • The compressive strength of concrete is determined by various influencing factors. However, the conventional method for estimating the compressive strength of concrete has been suggested by considering only 1 to 3 specific influential factors as variables. In this study, nine influential factors (W/B ratio, Water, Cement, Aggregate(Coarse, Fine), Fly ash, Blast furnace slag, Curing temperature, and humidity) of papers opened for 10 years were collected at 4 conferences in order to know the various correlations among data and the tendency of data. The selected mixture and compressive strength data were learned using the Deep Learning Algorithm to derive an estimated function model. The purpose of this study is to investigate the effect of the number of hidden layers on the prediction performance in the process of estimating the compressive strength for an arbitrary combination.

  • PDF

고성능 콘크리트의 압축강도 추정을 위한 초음파속도식의 검토 (Investigation on the Ultrasonic Pulse Velocity Equation for Estimating Compressive Strength of High Performance Concrete)

  • 이태규;김규용;최경철;강연우;김순묵;김수봉
    • 한국건축시공학회:학술대회논문집
    • /
    • 한국건축시공학회 2014년도 추계 학술논문 발표대회
    • /
    • pp.5-6
    • /
    • 2014
  • For estimating compressive strength of concrete, non-destructive test has conducted generally. It used experimental equation to calculate compressive strength from construction. This study investigated experiment to apply non-destructive test, based on fresh property, compressive strength and ultrasonic pulse velocity of high performance concrete. And it conducted to compare various proposed equation.

  • PDF

D형 Durometer를 이용한 모르타르의 응결 및 초기 압축강도 추정가능성 평가 (Study of the Possibility of Estimating the Setting Time and Early Aage Compressive Strength of Mortar Using D-type Durometer)

  • 한수환;후윈야오;임군수;현승용;김종;한민철
    • 한국건축시공학회:학술대회논문집
    • /
    • 한국건축시공학회 2021년도 가을 학술논문 발표대회
    • /
    • pp.103-104
    • /
    • 2021
  • This study attempted to confirm the possibility of estimating condensation time and initial compressive strength with five types of estimation needles in the existing Durometer D type. In order to determine the surface finishing operation time and develop a method for estimating the initial age compression strength, an estimation needle capable of complexly measuring the estimation time and the initial age compression strength based on the Durometer D type was derived as 1.5, 2.0mm.

  • PDF

Estimation of shear strength parameters of lime-cement stabilized granular soils from unconfined compressive tests

  • Azadegan, Omid;Li, Jie;Jafari, S. Hadi
    • Geomechanics and Engineering
    • /
    • 제7권3호
    • /
    • pp.247-261
    • /
    • 2014
  • Analytical and numerical modeling of soft or problematic soils stabilized with lime and cement require a number of soil parameters which are usually obtained from expensive and time-consuming laboratory experiments. The high shear strength of lime and cement stabilized soils make it extremely difficult to obtain high quality laboratory data in some cases. In this study, an alternative method is proposed, which uses the unconfined compressive strength and estimating functions available in literature to evaluate the shear strength parameters of the treated materials. The estimated properties were applied in finite element model to determine which estimating function is more appropriate for lime and cement treated granular soils. The results show that at the mid-range strength of the stabilized soils, most of applied functions have a good compatibility with laboratory conditions. However, application of some functions at lower or higher strengths would lead to underestimation or overestimation of the unconfined compressive strength.

기포제 혼입 단열형 경량모르타르의 물리적 특성 및 압축강도 추정에 관한 기초적 연구 (Fundamental Study on Estimating Compressive Strength and Physical Characteristic of Heat insulation Lightweight Mortar With Foam Agent)

  • 민태범;우영제;이한승
    • KIEAE Journal
    • /
    • 제10권3호
    • /
    • pp.89-96
    • /
    • 2010
  • In comparison with ordinary or heavy-weight concrete, light-weight air void concrete has the good aspects in optimizing super tall structure systems for the process of design considering wind load and seismic load by lightening total dead load of buildings and reducing natural resources used. Light-weight air void concrete has excellent properties of heat and sound insulating due to its high amount porosity of air voids. So, it has been used as partition walls and the floor of Ondol which is the traditional Korean floor heating system. Under the condition of which the supply of light-weight aggregates are limited, the development of light-weight concrete using air voids is highly required in the aspects of reduced manufacturing prices and mass production. In this study, we investigated the physical properties and thermal behaviors of specimens that applied different mixing ratios of foaming agent to evaluate the possibility of use in the structural elements. We proposed the estimating equation for compressive strength of each mix having different ratio of foaming agent. We also confirmed that the density of cement matrix is decreased as the mixing amount of foaming agent increase up to 0.6% of foaming agent mixing ratio which was observed by SEM. Based on porosity and compressive strength of control mortar without foaming agent, we built the estimating equations of compressive strength for mortars with foaming agent. The upper limit of use in foaming agent is about 0.6% of the binder amount. Each air void is independent, and size of voids range from 50 to $100{\mu}m$.

고유동 콘크리트의 응결특성과 압축강도 발현 (Setting and Compressive Strength Development of Hihg Flowing Concrete)

  • 권영진;김무한
    • 한국콘크리트학회:학술대회논문집
    • /
    • 한국콘크리트학회 1995년도 가을 학술발표회 논문집
    • /
    • pp.8-13
    • /
    • 1995
  • High flowing concrete has been made using a combination of different cementitious material. The use of supplementary cementitious material like ground granulated slag is not only interesting from an economical point of view but also from a mechanical and rheological point of view. In the case of high strength concrete, relation between the maturity and compressive strength development of high strength concrete is aproximated by appling gompertz curve and suggested new estimating method. It is the aim of this study to analysis the effect of different types of mineral fine power on the setting and compressive strength development of high flowing concrete.

  • PDF

복합비파괴검사법에 의한 콘크리트 강도평가와 그 응용 (Estimation of concrete strength by non-destructive combined method and its application)

  • 한혁상
    • 비파괴검사학회지
    • /
    • 제12권1호
    • /
    • pp.35-39
    • /
    • 1992
  • The purpose of this report is to obtain a practical expression for estimating the compressive strength of concrete using the non-destructive method of testing combining rebound number and ultrasonic pulse velocity at the construction sites for obtaining highest accuracy in predicting the compressive strength.

  • PDF

Wave Propagation 기법을 이용한 콘크리트의 압축강도 추정 (Estimating Concrete Compressive Strength Using Wave Propagation Method)

  • 권수안;안지환;서영찬;조용주
    • 한국도로학회논문집
    • /
    • 제7권3호
    • /
    • pp.63-69
    • /
    • 2005
  • 콘크리트 포장의 품질관리 항목 중에서 압축 강도는 매우 중요한 인자로 여겨져 왔다. 압축 강도 값을 얻기 위해 현장에서 코아를 채취하여 이를 품질관리의 기준으로 사용하였다. 그렇지만, 코아를 채취하는 것은 많은 인력과 시간을 필요로 하며 실제로 현장의 품질관리를 정확히 추정하는데 많은 어려움이 있다. 또한 포장의 설계 방법도 탄성계수에 근거한 역학적-경험적 방법이 도입되고 있다. 이러한 현장의 품질관리 문제점을 해결하고, 포장설계와의 연계를 위해 비파괴 실험방법이 도입되고 있다. 다양한 비파괴 실험 방법 중에서 이론적으로 탄성계수를 추정할 수 있는 방법은 Wave Propagation방법이므로 본 연구에서는 Wave Propagation 방법을 도입하였다. 본 연구에서는 현장의 품질관리를 수행하는 방법 중의 일환으로 실내에서 제작한시편의 압축 강도와 비파괴 방법으로 얻은 탄성 계수와의 상관성을 검토하였으며, 비파괴 방법으로 얻은 탄성 계수로부터 압축 강도를 추정 할 때 배합별 특성에 대한 분석을 실시하였다. 비파괴 실험에서 구한 탄성계수와 압축강도와의 상관성은 매우 우수한 것으로 판명되었으며, 골재의 종류별로 상관성이 서로 상이하게 나타남을 알 수 있었다.

  • PDF

배합 인자를 고려한 Deep Learning Algorithm을 이용한 콘크리트 압축강도 추정 기법에 관한 기초적 연구 (A Basic Study on Estimation Method of Concrete Compressive Strength Based on Deep Learning Algorithm Considering Mixture Factor)

  • 이승준;김인수;이한승
    • 한국건축시공학회:학술대회논문집
    • /
    • 한국건축시공학회 2017년도 추계 학술논문 발표대회
    • /
    • pp.83-84
    • /
    • 2017
  • In the construction site, it is necessary to estimate the compressive strength of concrete in order to adjust the demolding time of the form, and establish and adjust the construction schedule. The compressive strength of concrete is determined by various influencing factors. However, the conventional method for estimating the compressive strength of concrete has been suggested by considering only 1 to 3 specific influential factors as variables. In this study, seven influential factors (W/B ratio, Water, Cement, Fly ash, Blast furnace slag, Curing temperature, and humidity) of papers opened for 10 years were collected at three conferences in order to know the various correlations among data and the tendency of data. The purpose of this paper is to estimate compressive strength more accurately by applying it to algorithm of the Deep learning.

  • PDF