由於澎湖地區咾咕石建築的基礎研究不足，致使其維護與修護工程的困難度增加，因此本論文的目的乃是期望以材料觀點，探討該地區傳統咾咕石建築所使用之建材—“灰漿”的性質，並將其在現今咾咕石再利用的建築中之使用狀況提出探討。研究方法是透過文獻、現況調查、匠師訪談得知以往灰漿採用的原料以及它破壞的因素；此外，再利用實驗方法取得仿作灰漿試體的基本性質（物理與化學性質），以便進行上述議題的討論。

　　進行研究時，必須先就文獻資料了解傳統咾咕石建築的構造形式與傳統建築所用灰漿的基本性質，並配合現況調查及匠師訪談來了解灰漿拌合的原料；再者，就傳統咾咕石建築以及咾咕石再利用的建築所使用的灰漿進行採樣，並進行成分分析，另採集咾咕石加上依匠師所述之配比仿作的灰漿試體，進行吸水率、抗壓及抗拉實驗，再彙整分析實驗數據；最後，對上述二種狀況所使用的灰漿提出其合理之應用方式，並進一步提出其用料的最佳配比。

　　由研究得知，灰漿的用料極具地方性，尤其是離島砂的特殊性，除了影響灰漿的強度外，也直接影響到X-射線繞射圖的成分分析判讀；在實驗中發現，以其傳統用料所仿作的試體易溶於水且強度低於咾咕石的抗壓強度；而以二崁聚落修復工程灰漿材料所仿作的試體，大部份因含有水泥及白灰，故其抗壓強度均高強於基材咾咕石。

　　傳統咾咕石建築的灰漿材料以及咾咕石本身皆取之於大自然再回歸到大自然，是典型的綠建材；傳統咾咕石建築的灰縫應該使用可降低吸水率的白灰作為摻料來施作填縫或勾縫，如此可避免雨水的浸入造成土質流失以及室內居住的不舒適程度；而咾咕石再利用之建築所用的灰漿，雖無新舊灰漿差異的問題，但灰漿的強度應該低於基材，並且應降低水泥用料，方可使咾咕石建材易於回收與再利用，讓傳統的咾咕石建材繼續在樸實的澎湖展現其特殊的建築風格。

　　In consideration of the fundamental research of the Lao-Gu stone masonry is insufficient, so that the difficulties of those maintenance and reparation increase. The purpose of this thesis is to study the properties of mortar which was used on the traditional Lao-Gu stone masonry in Peng-Hu in the view of material. The nowadays application of the materials, mortar, of the re-used Lao-Gu stone masonry is also taken into deliberation. The research is proceeding by means of consulting the scientific literature, doing the fieldwork and interviewing the skilled craftsmen in order to be aware of the raw materials and the destroyed factor of mortar used before. Besides, we expect to obtain the physics and chemical characters of the modeled mortar sample with the result that we are able to carry the conclusion of research out.

　　First of all, the structure of traditional Lao-Gu stone masonry and the nature ofconventional masonry mortar are acquainted by making a study of the scientific literature. The investigation of present situation and the craftsmen’s interview help us to be informed of the mixed materials of mortar. Furthermore, the mortar samples which are collected from Lao-Gu stone masonry of old and the re-used Lao-Gu stones are used to analyze the elements. Lao-Gu stones and the mortar which are imitated referring to the craftsmen’s statements are applied to several relevant experiments, including the water absorptivity, compressive resistance, pulling experiments, and then collect as well as analyze those experimental data. Eventually, based on the tests of above, the best mixed proportion and the equitable application shall be proposed about the traditional Lao-Gu stone masonry mortar and the mortar of re-used Lao-Gu tones.

In accordance with the research, the material, mortar, which was used to be laid on,is extremely local. The gravel sand of the off-shore island has influences on the intensity
of mortar as well as the estimation on the composition analysis of x-ray diffract meter’s chart. According to experiment, the researcher finds out that the samples of traditional mortar material model are more easily dissolved by water, and its compressive strength is lower than Lao-Gu stone itself. However, the samples that modeled upon the
reconstruction of Erh-Kan town in Ma-Gong city are with more compressive strength than Lao-Gu stones because of the mixture of cement mortar and calcimine.

　　The materials of traditional Lao-Gu masonry, mortar, and Lao-Gu stones that come from earth and return to earth are environmental building materials typically. The seam of aged Lao-Gu masonry should be filled up with the mortar that is mixed with calcimine,which can decrease the water absorptivity. It will avoid soaking of rain that causes the soil to be washed away and brings the comfortless feeling indoors. Although there are no differences from the old to the new over the mortar of re-used Lao-Gu stones, the strength of mortar should be lower than the fundamental material, Lao-Gu stone, and should reduce the amount of cement. That will make the Lao-Gu stones building materials recycled and reused more easily in order that the traditional Lao-Gu stones building materials could perform their special architecture on unsophisticated Peng-Hu everlastingly.

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