• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2006년도 추계 학술논문 발표대회 논문집
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• pp.53-56
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• 2006

The objection of this study is to investigate the properties of cement mortar with the kinds and addition of expansive additives. 3 kinds of expansive additives produced in our country and 0, 5, 10, 15, 20% of ratio of addition rate are selected for this experiment. According to experimental results, flow of cement mortar with expansive additives is nearly same with flow of plain mortar and compressive strength, tensile strength, bend strength of cement mortar with expansive additives at 28 days is higher than that of plain mortar.

• 한국농공학회:학술대회논문집
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• 한국농공학회 1998년도 학술발표회 발표논문집
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• pp.107-112
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• 1998

The objective of this study was to develop a polymer mortar defensive block with high strength and durability using unsaturated polyester resin to complement defects of conventional cement mortar defensive block. Physical and mechanical properties of the polymer mortar defensive block were also investigated. Low absorptivity, high impact strength, and great bending strength of the polymer mortar defensive block was compared with those of the conventional cement defensive block. In conclusion, the polymer mortar defensive block is excellent and useful as industrial products for erosion control works.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2006년도 춘계 학술발표회 논문집(II)
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• pp.65-68
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• 2006

In this study, comparison of setting time, compressive strength, watertightness and durability of between reference mortar with mortar using waterproof admixtures based on natural inorganic minerals. Test results shows that waterproof admixtures does not change setting time of mortar, but strongly improve compressive strength, permeability, absorption and durability of mortar. Especially early strength of mortar increased about 40% of reference.

• 한국건축시공학회지
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• 제12권5호
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• pp.468-477
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• 2012

This study aimed to mix and test mortar incorporating activated Hwangtoh to improve the Hwangtoh brick bond strength of brick structures. To do this, the bond strength correlation of mortar was analyzed by means of materials and experiment factors and levels, and the optimum conditions were suggested after analyzing the physical properties of brick and the mix ratio of mortar and additive. Furthermore, the compressive strength and bond strength were found to be in inverse proportion, and in terms of the materials and mixing level, W/C ratio, substitution ratio of activated Hwangtoh, and fine aggregate grading were shown to have a considerable influence on the strength. In conclusion, the optimum mixing conditions to improve the bond strength are found to set W/C ratio at 65% and replacmenet ratio of activated Hwangtoh at 10%.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2012년도 추계 학술논문 발표대회
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• pp.265-266
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• 2012

The purpose of this study was to investigate the compressive strength property into mortar using rice straw ash. In an effort to evaluate the effects of rice straw ash firing temperatures on compressive strength properties of mortar, a change in the components of rice straw ash was observed according to firing temperatures, and compressive strength of mortar and X.R.F was measured. As a results, As the mortar with a mixture ratio of rice straw ash up to 15% was found to have a compressive strength superior to that of plain mortar.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2020년도 가을 학술논문 발표대회
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• pp.21-22
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• 2020

This study is about high strength self-leveling mortar according to the mixing ratio of polymer. The self-leveling mortar currently released in Korea maintains a compressive strength of 40 Mpa as of 28 days. In addition, the level of bonding strength and flexural strength are kept the same. However, through this study, it is confirmed how the self-leveling mortar with a compressive strength of 60Mpa as of the 28th is shown according to the amount of polymer mixed. Experimental factors were configured according to the amount of polymer mixed, and the types of experiments were to confirm compressive strength, flexural strength, adhesion strength and flow. In addition, by confirming the early strength, a study was conducted to improve the quick workability compared to the self-horizontal mortar in the market.

• 한국구조물진단유지관리공학회 논문집
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• 제24권1호
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• pp.67-73
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• 2020

본 연구에서는 실험을 통하여 자기치유 재료 혼입 모르타르 보의 자기치유 성능을 평가하였다. 실험에는 일반 모르타르 보 실험체와 자기치유 모르타르 보 실험체가 사용되었으며, 모르타르의 압축강도, 내력 및 균열의 자기치유 효과를 비교하여 자기치유 성능을 평가하였다. 실험결과 자기치유 재료를 혼입한 모르타르의 압축강도가 일반 모르타르의 압축강도보다 작았지만 28일 압축강도에 대한 118일 압축강도 비율은 동일하게 나타났다. 실험체의 내력은 재령일이 길어질수록 증가하는 경향을 나타냈다. 일반 모르타르 실험체는 균열이 발생할 경우 재령일이 증가하여도 하중은 회복되지 않았으나 자기치유 모르타르 실험체의 경우 반응 생성물의 영향으로 내력이 다소 회복되는 경향을 나타냈다. 균열폭은 두 종류의 실험체 모두 치유기간이 지난 후 감소하는 경향을 보였으나 자기치유 모르타르 실험체에서만 반응생성물이 관찰되었다.

• 보존과학회지
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• 제34권4호
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• pp.295-303
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• 2018

The application of reinforcing agents with hydraulic property and strength development characteristics was studied under conditions similar to those of mural-painting mortar made with oyster shell powder. Reinforcement mortar made with oyster shell powder showed hydraulic properties and strength to supplement the weaknesses of natural hydraulic lime(NHL); this confirmed its possibility as a wall-reinforcing material with enough strength for preserving mural paintings. Reinforcement mortar 1 showed hydraulic property and general characteristics of lime mortar, such as consistency and viscosity, as well as lower strength and higher whiteness compared to an NHL product. For Reinforcement mortar 2, the original wall sample characteristics were reflected by mixing more shell produced through calcination; and it showed similar strength to that of Reinforcement mortar 1 as well as high whiteness. In measuring the contraction ratio of reinforcement mortar samples, Reinforcement mortar 1 and 2 showed more stability in property change compared to the NHL Group.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2018년도 춘계 학술논문 발표대회
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• pp.89-90
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• 2018

The strength of cement mortar is one of the most important factors in design and construction. Strength can vary widely depending on factors such as water cement ratio, aggregate and materials and curing. In the study, it was found that the standardized method of making the cement mrtar was different from the standard method of preparing the cement mortar by the different process of the cement mortar. I wanted to know the difference. Experiments were carried out to investigate the differences in strength, physical properies and performance depending on the points when the sample were made long in vertical form.

• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2002년도 추계학술대회 논문집
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• pp.79-82
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• 2002

To study the effect of functional water on the compressive strength of mortar, city water was changed to functional water through ceramics treatment. The change of characteristics of water was measured with $O^{17}$ NMR and Killian Camera. The compressive strength of mortar was measured with various curing conditions. The test results show that by the ceramics treatment the characteristics of city water was changed. At 28 days under curing condition, the compressive strength of mortar which was mix-proportioned with treated water was increased about 22 % than that of mortar which was mix-proportioned with untreated city water.