In this study, rational prediction models for the effective compressive strengths of HSC corner and interior columns with intervening NSC slabs are developed. A structural analogy between HSC column-NSC slab joint and brick masonry is used to develop the prediction models. In addition, the aspect ratio of slab thickness to column dimension and the surrounding slab confinement effect are considered in the models. The proposed prediction model is verified by comparison with experimental results and various prediction expressions. As a result, with average test-to-predicted ratios of 1.00 for HSC corner columns and 1.09 for interior columns, the proposed equation provides superior predictions over all of the existing effective strength prediction approaches including KCI structural concrete design code(2012).

In this work, lightweight brick was prepared from aluminum dross, MS and MBA. Aluminum dross is discharged as by-product through the process of aluminum smelting. It can be used as foaming agent, because it produces hydrogen gas due to the reaction with alkali activator. In this study, the specific gravity and compressive strength of prepared brick was discussed with the addition of aluminum dross. Compressive strength, flexural strength and specific gravity was 36 MPa, 2.6 MPa and 1.48 at mixing ratio of 0.9wt% aluminum dross, respectively. The physical property of brick was debased with the addition of aluminum dross. Because the pore size was bigger in accordance with the addition of aluminum dross.

This study revealed that seismic retrofit technology which has to conduct seismic retrofit work after removing facing walls from a reinforced concrete structured building constructed with masonry walls and facing walls, bears disadvantages of additional costs both for removal of facing walls and for brick masonry and possibility to incur the secondary damage from collapse of facing walls. Therefore, this study aims to develop a seismic retrofit technique and examines its performance which can yield sufficient seismic retrofit effect without additional retrofit of facing walls by forming a pile-bent reinforced concrete walls with facing walls after removing masonry walls.

Consumers increasingly prefer HDTV (high definition television), including LCD (liquid crystal display), LED (light emitting diode), and plasma TVs (television), and existing analog TV broadcasting system will be switched to digital broadcasting at the end of 2012 in Korea. Even for computer monitors, CRT (cathode-ray tube) monitors are no longer preferred because of customers’ increasing desire for thinner and lighter monitors and mobile computers. It is anticipated that these shifts will lead to a dramatic increase in disposal of analog TV sets. In 2012, it is estimated that about 117 thousand tons of CRT glass waste will be generated in Korea. CRT glass waste is not only Korea’s problem but also global issue, which needs worldwide attentions and policies for conserving useful resources and preventing groundwater pollution from heavy metals contained in CRT glass waste in case of landfill. It is important to develop BATs (best available technologies) to recycle CRT glass waste properly in short times. Therefore, in this study recycling possibility of CRT class was evaluated for the clay brick including powder of CRT glass of after crushing. Compressible strength and absorption factor of fabricated sample clay bricks were measured and observed whether they could satisfy the Korean Industrial Standard to use as normal bricks or not. The clay bricks containing under 5% of CRT panel glass powders were found to show enough quality as bricks, therefore the recycling of CRT cullet as materials of clay bricks could be utilized as one of the options.

Expanding economic growth, the increased and shortened of electronic products rapidly last a couple of decades in Korea. Furthermore, as converting to digital broadcasting system, the amount of discarded analog type TV containing cathode ray tube(CRT) glasses are increasing significantly. Accordingly, since there is no demand for CRT glass anymore, it is very important to find out how to recycle a waste CRT glass. The research was carried out to investigate the best available technologies for recycling waste CRT glass. Primary feasibility studies to find the appropriate technologies were performed in advance and then the use as aggregates of cement bricks was found as a simple and economic way of recycling CRT panel glass cullet. Based on the selection of proper technology, which is the aggregate of cement bricks fabrication using CRT glass crushed, the evaluation of recyclability were made by replacing CRT glass particles to aggregates in the mixture of cement bricks. Up to 50% of sand or stone powder was replaced and the bricks with CRT glasses were manufactured and tested in their qualities as concrete bricks. The bricks including 20 to 30% of CRT particles instead sand or stone powder were good enough to meet the standard in bending strength and absorption rate.

Recently, brick walls are being widely introduced in rural areas. Walls are a very important design element of space. However, most brick wall works do not consider the human psychological characteristics. The purpose of this study was to investigate psychological characteristics on brick wall bonds such as the stack bond, running bond, english bond, flemish bond, america bond. The results of the research can be summarized as follows: 1)There is no statistical difference of psychological evaluation results among student groups using the semantic differential scale method using 10 adjectives. 2)Stack bonds have an uninspiring, artificial, simple, restful, boring and ordered psychological characteristic. Running bonds have an uninspiring, restful and ordered psychological characteristic. America bonds have a unique and modernistic psychological characteristic. English bonds have a unique, modernistic, complex and chaotic psychological characteristic. Flemish bonds have no critical psychological characteristics. 3)The running bond earned the highest score in preference, while the stack bond scored the lowest. Employment of brick wall bonds on this study was not highly preferred, hence it is necessary to develop a new brick wall bond design. 4)In conclusion, the proper selection of brick wall bonds is very important and we should consider human psychological characteristics in the design of rural areas.

최근 생태․친환경 건축이 화두로 등장하면서 친환경 건축재료인 점토벽돌과 공기의 흐름과 수분의 이동이 가능한 석회모르타르의 사용이 증가하고 있다. 하지만 국내 연구는 콘크리트벽돌과 시멘트모르타르에 집중되고 있어 점토벽돌 및 석회모르타르에 대한 연구가 거의 없는 실정이며, 조적조의 국내 기준 또한 국내에서 사용되는 재료와 다른 물리적 값을 사용하고 있는 국외기준을 바탕으로 제정되어 국내 실정을 적절히 반영하지 못하고 있다. 따라서 본 연구는 프리즘압축강도, 부착강도, 전단 및 사인장강도 실험을 통해 점토벽돌과 석회모르타르를 사용한 조적구조의 물리적 특성을 파악하고자 한다. 또한, 콘크리트벽돌과 시멘트모르타르를 사용한 조적구조와의 물리적 특성을 비교분석하여 국내 조적기준을 개정하기 위한 근거를 제시하고자 한다. 점토벽돌과 석회모르타르를 적용한 조적구조는 콘크리트벽돌과 시멘트모르타르를 사용한 조적구조와는 다른 양상을 보이므로 점토벽돌과 석회모르타르를 적용한 조적구조의 프리즘압축강도와 탄성계수에 대한 추정식을 제안한다.

Recently, brick pavement were widely introduced on the pavement in rural area. A variety of vision effects can be created from patterns of brick pavement. However, in most of brick pavement works, human psychological characteristics were not concerned. The purpose of this research was to discover psychological effect on brick pavement pattern. The results of the research can be summarized as follows: 1)Psychological impression on brick pavement pattern is similar among man and woman groups. 2)Stack bond and running bond pattern have a simple, relaxed, organized, and comfortable psychological characteristics. Basket weave & stack bond pattern has a simple and organized psychological characteristic. Herringbone bond pattern has a complex, dislike and uncomfortable psychological characteristic. Pinwheel bond pattern has a highly complex psychological characteristic. Basket weave and Basket weave variation bond pattern have a common psychological characteristic. 3)Employment of brick pavement pattern on this research is not highly preferred, hence it is necessary to develop a brick pavement patterns that have human psychological characteristics be concerned.

본 연구는 조적조 치장벽체의 신축과 보강공사에 사용될 수 있는 나선형 긴결철물을 사용하여 내부벽체와 긴결된 치장벽체의 전단거동실험을 행하여 이 벽체의 구조적 성능을 검증하고 적절한 시공간격⋅형태 등을 제안하기 위한 실험연구이다. 본 연구를 통해 벽체의 Rocking거동에 있어서는 나선형 긴결철물을 사용한 벽체가 기존 시공법의 벽체보다 동일 간격에서는 우수한 전단저항능력을 나타내며, 간격이 30%정도 증가하여도 유사한 능력을 발휘한다. 짧은 간격에서의 긴결도는 기존 시공법보다 상당히 높음으로 고층건물의 치장벽체로 연와조 조적체의 적용가능성을 높일 수 있을 것으로 판단된다.