• Title/Summary/Keyword: paper-ash mortar

Search Result 54, Processing Time 0.026 seconds

An Experimental Study on the Properties of Mortar Mixing Paper Ash (제지애쉬를 혼입한 모르터의 특성에 관한 실험적 연구)

  • Lee, Si-Woo
    • Journal of the Korea Institute of Building Construction
    • /
    • v.2 no.3
    • /
    • pp.115-121
    • /
    • 2002
  • The purpose of this study is investigating characteristics of paper-ash mortar according to partial replacement of fine aggregate by Paper-ash. For this purpose, selected test variables were mixing ratio with two levels of mortar(1:2, 1:3), and 3 types of paper-ash(A, B, C), and paper-ash content with four levels(5%,, 10%, 15%, 20%). As a result of this study, in all mixes with partial replacement of fine aggregate by Paper-ash generally Produced Paper-ash mortar with decreased compressive strength at ail age as compared to ordinary mixes. The mixing rate 1:2 was the higher increasing rate of strength than the mixing rate 1:3. The flow value and unit weight of paper-ash mortar were decreased with increasing of the paper-ash content. And the thermal conductivity of the thermal conductivity of the paper-ash mortar was lower than normal mixing without paper-ash.

Mathematical model of strength and porosity of ternary blend Portland rice husk ash and fly ash cement mortar

  • Rukzon, Sumrerng;Chindaprasirt, Prinya
    • Computers and Concrete
    • /
    • v.5 no.1
    • /
    • pp.75-88
    • /
    • 2008
  • This paper presents a mathematical model for strength and porosity of mortars made with ternary blends of ordinary Portland cement (OPC), ground rice husk ash (RHA) and classified fly ash (FA). The mortar mixtures were made with Portland cement Type I containing 0-40% FA and RHA. FA and RHA with 1-3% by weight retained on a sieve No. 325 were used. Compressive strength and porosity of the blended cement mortar at the age of 7, 28 and 90 days were determined. The use of ternary blended cements of RHA and FA produced mixes with good strength and low porosity of mortar. A mathematical analysis and two-parameter polynomial model were presented for the strength and porosity estimation with FA and RHA contents as parameters. The computer graphics of strength and porosity of the ternary blend were also constructed to aid the understanding and the proportioning of the blended system.

Preparation and its Characteristics of Fly Ash-based Geopolymeric Mortar using Low Grade Silica Waste (저급규석을 활용한 Fly Ash 지오폴리머 모르타르 제조 및 특성)

  • Son, Se-Gu;Hong, Seung-Yeob;Kim, Young-Do
    • Journal of the Korean Ceramic Society
    • /
    • v.45 no.7
    • /
    • pp.395-400
    • /
    • 2008
  • This paper indicates the investigation about the development of ET (Environmental Technology) industrial geopolymeric materials from mixture silica mine waste, coal fly ash and alkali activator solution (sodium silicate) by the geopolymer technique at ambient temperature. The results showed that higher compressive strength of geopolymeric mortar increased with a reduce of L/S ratio and increased along with an increase of coal fly ash content. The compressive strengths of geopolymer mortar on low silica of C Silica Mine and K Silica Mine are 18.7 MPa, 20.4 MPa, respectively. Compressive strength of geopolymeric mortar depends on L/S ratio and coal fly ash content added.. Additionally, scanning electron microscope (SEM) techniques are used to characterize the microstructure of the geopolymeric mortars. SEM observation shows that it is possible to have amorphous aluminosilicate gel within mortar. XRD patterns indicate the fact that geopolymeric mortar is composed of amorphous aluminosilicate phase, calcite and quartz.

The Influences of Cement Mortar Replaced by Paper Sludge Ash and Blast Furnace Slag (제지 슬러지 애쉬 고로슬래그 미분말로 혼합치환한 시멘트가 모르타르에 미치는 영향)

  • 소병현;이주나;박찬수
    • Proceedings of the Korea Concrete Institute Conference
    • /
    • 2002.10a
    • /
    • pp.3-9
    • /
    • 2002
  • Paper sludge ash was assured as material of a sort of pozzolan. For the reason of fluidity decrease caused by the strong absorption of paper stooge ash and the decrease of compressive strength in case of using over30% replacement by the weight of cement, paper sludge ash is not suitable for blending material. Therefore, it is necessary to find proper replacement ratios between paper sludge and blast furnace slag to insure compressive compensation and appropriate slump. Accordingly, as varied the blending ratios of paper sludge and blast furnace slag, testing mortar was made. This study was aimed to investigate the possibility of using blending replacement of paper sludge ash and blast furnace slag throughout compressive test, flow test, SEM(Scanning Eletron Microscope), MIP(Mercury Intrusion Porosity test), and TG-DTA(Thermal analysis).

  • PDF

Recycling of the Bottom Ash, Sourced from the Local MSW (Municipal Solid Waste) Incinerators, as a Fine Sand for Concrete (소각장(燒却場)에서 발생되는 바닥재의 콘크리트용 잔골재(骨材)로서의 재활용(再活用))

  • Lim, Nam-Woong
    • Resources Recycling
    • /
    • v.16 no.2 s.76
    • /
    • pp.40-47
    • /
    • 2007
  • This paper described recycling of the bottom ash, sourced from the local incinerators as a fine sand for concrete. 10% bottom ash was substituted for the ordinary beach sand in the mortar(on a weigh basis), in conjunction with the pozzolznic diatomite. The specimens were tested according to KS L 5105 and analysed by TCLP(Toxic Chemical Leaching Procedure). The results showed that the hazardous heavy metals in the bottom ash are within the maximum permissible limit of TCLP. The compressive strength of the mortar with 10% bottom ash was highly improved, compared to the control mortar when the pozzolanic diatomite was used. It revealed that the hazardous heavy metals of the mortar with 10% bottom ash were leached within the maximum permissible limit of TCLP. It was concluded that the bottom ash can be reused as a fine sand for concrete when the pozzolanic diatomite was used as a stabilizer.

Prediction of compressive strength of lightweight mortar exposed to sulfate attack

  • Tanyildizi, Harun
    • Computers and Concrete
    • /
    • v.19 no.2
    • /
    • pp.217-226
    • /
    • 2017
  • This paper summarizes the results of experimental research, and artificial intelligence methods focused on determination of compressive strength of lightweight cement mortar with silica fume and fly ash after sulfate attack. The artificial neural network and the support vector machine were selected as artificial intelligence methods. Lightweight cement mortar mixtures containing silica fume and fly ash were prepared in this study. After specimens were cured in $20{\pm}2^{\circ}C$ waters for 28 days, the specimens were cured in different sulfate concentrations (0%, 1% $MgSO_4^{-2}$, 2% $MgSO_4^{-2}$, and 4% $MgSO_4^{-2}$ for 28, 60, 90, 120, 150, 180, 210 and 365 days. At the end of these curing periods, the compressive strengths of lightweight cement mortars were tested. The input variables for the artificial neural network and the support vector machine were selected as the amount of cement, the amount of fly ash, the amount of silica fumes, the amount of aggregates, the sulfate percentage, and the curing time. The compressive strength of the lightweight cement mortar was the output variable. The model results were compared with the experimental results. The best prediction results were obtained from the artificial neural network model with the Powell-Beale conjugate gradient backpropagation training algorithm.

Strength and chloride penetration of Portland cement mortar containing palm oil fuel ash and ground river sand

  • Rukzon, Sumrerng;Chindaprasirt, Prinya
    • Computers and Concrete
    • /
    • v.6 no.5
    • /
    • pp.391-401
    • /
    • 2009
  • This paper presents a study of the strength and chloride penetration of blended Portland cement mortar containing ground palm oil fuel ash (POA) and ground river sand (GS). Ordinary Portland cement (OPC) was partially replaced with POA and GS. Compressive strength, rapid chloride penetration test (RCPT) and chloride penetration depth of mortars were determined. The GS only asserted the packing effect and its incorporation reduced the strength and the resistance to chloride penetration of mortar. The POA asserted both packing and pozzolanic effects. The use of the blend of equal portion of POA and GS also produced high strength mortars, save cost and excellent resistance to chloride penetration owing to the synergic effect of the blend of POA and GS. For chloride depth, the mathematical model correlates well with the experimental results. The computer graphics of chloride depth of the ternary blended mortars are also constructed and can be used to aid the understanding and the proportioning of the blended system.

Influence of Admixtures on Strengths and Freezing and Thawing Resistance of Cement Mortar for Precast Products (혼화재료가 공장제품용 시멘트 모르타르의 강도 및 동결융해 저항성에 미치는 영향)

  • 한천구;신병철;김기철;이상태
    • Journal of the Korea Concrete Institute
    • /
    • v.12 no.3
    • /
    • pp.11-19
    • /
    • 2000
  • It has been reported that few manufacturers of cement mortar for precast products use chemical and mineral admixture due to the absense of restrictions related to the application of admixture and the poor manufacturing facilities. Therefore, this paper is intended to contribute to the improvement of quality by investigating the properties of cement mortar for precast products using fly ash, blast furnace slag and AE water reducing agent. According to the test results. it was found that the cement mortar products using fly ash and AE water-reducing agent had better qualities than those of ordinary portland cement.

Experimental Study on Fundamental Quality Characteristics of Non-cement Repair Mortar Using High-volume Fly Ash Based on Potassium Magnesia Phosphate (마그네시아-인산칼륨 기반 하이볼륨 플라이애시 활용 무시멘트 보수 모르타르의 기초 품질 특성에 대한 실험적 연구)

  • Doo-Won Lee;Il-Young Jang
    • Journal of the Korean Recycled Construction Resources Institute
    • /
    • v.12 no.2
    • /
    • pp.152-161
    • /
    • 2024
  • This paper investigates the manufacturing and fundamental quality characteristics of potassium magnesia phosphate-based non-cement high-volume fly ash repair mortar. To derive the optimal mix for non-cement mortar, the manufacturing characteristics were evaluated based on the magnesia ratio, and the mortar manufacturing characteristics were assessed with the fly ash mixture. Additionally, the non-cement magnesia repair mortar was produced considering the effects of fly ash mixture and basalt fiber. The evaluation results determined the optimal mix of non-cement magnesia repair mortar, and the feasibility was examined through workability and fundamental quality assessments. The optimal magnesia ratio was found to be P:M 1:0.5, with W/B at 30 %. It was also confirmed that mixing FA and basalt fiber improves fiber dispersion and workability. Even with over 50 % FA mixture, the target strength was achieved within six hours, with a flow increase of up to 18 % and a flexural strength decrease of about 1-2 MPa.

Effect of Incineration Plant Ash on Fundamental Properties of High Volume Blast Furnace-Slag Mortar incorporating Recycled Aggregate Powder (소각장애시의 치환률 변화에 따른 순환골재 미분말 함유 고로슬래그 다량치환 모르타르의 기초적 특성)

  • Huang, Jin-Guang;Park, Jae-Yong;Jung, Sang-Woon;Heo, Young-Sun;Han, Min Cheol;Han, Cheon Goo
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • 2013.11a
    • /
    • pp.126-127
    • /
    • 2013
  • For the decades, various of materials were used to instead of cement as the high volume CO2 occurred during the process of cement manufacture. In this paper, incineration plant ash was used in the mortar which incorporating high volume of blast furnace slag. Water to binder ratio(W/B) is fixed as 50%,BS+RP's replacement ratio is fixed as 80%,and the replacement ratio of WA1 is range as 0,0.5,1,2,3,4,5%.For the fresh mortar, flow and chloride contents has been tested. For the hardened mortar, compressive strength at 3,7,28 days has been tested. the result shows that when the replacement ratio of WA1 is 0.5%,the chloride contents is less than 0,3 kg/m3,the flowability and strength also performed better than other replacement types of mortar.

  • PDF