Paper 3: Impact of the Indoor Climate on the Performance of Building Materials Contaminated with Salt Mixtures

Abstract

Archaeological sites are essentially submitted to decay phenomena inherent on their history as well as the environment to which they are exposed after excavation. The history of such archaeological sites is particularly related to their long-term underground conservation conditions during which they were subject to salt migration into the architectural remains.

It is well known that soluble salts present in building materials can cause damage, mainly by producing stresses in the substrate. A lot of research has been done in the past concerning the behaviour of salts in built constructions. However, most studies include single salts, of which the deliquescence points are well documented, while in situ one mostly finds complex salt mixtures, which makes the conservation strategy much more intricate.

The environmental conditions to minimize damage of salt-laden porous building materials can be modelled using a computer program ECOS capable of predicting the crystallization behaviour of salt mixtures. To use the model data of quantitative salt analyses are required as input. The program is then able to predict from a thermodynamic point of view which minerals will exist in the solid state under specified climatic conditions.

This paper deals with the results of a systematic investigation of the salt contamination of the building materials of the Coudenberg site and a prediction of the behaviour of the salt mixture related to the actual climate, as part of the environmental assessment.     

Indications of formation water flow and compartmentalization on the flank of a salt structure derived from salinity and seismic data

Vertical and lateral variations in lithology, salinity, temperature, and pressure determined from wireline LAS logs, produced water samples, and seismic data on the south flank of a salt structure on the continental shelf, offshore Louisiana indicate three hydrogeologic zones in the study area: a shallow region from 0 to 1.1 km depth with hydrostatically pressured, shale‐dominated Pleistocene age sediments containing pore waters with sea water (35 g l^?1) or slightly above sea water salinity; a middle region from 1.1 to 3.2 km depth with near hydrostatically pressured, sand‐dominated Pliocene age sediments that contain pore waters that range from seawater salinity to up to 5 times sea water salinity (180 g l^?1); and a deep section below 3.2 km depth with geopressured, shale‐dominated Miocene age sediments containing pore waters that range from sea water salinity to 125 g l^?1. Salt dissolution has generated dense, saline waters that appear to be migrating down dip preferentially through the thick Pliocene sandy section. Sand layers that come in contact with salt contain pore waters with high salinity. Isolated sands have near sea water salinity. Salinity information in conjunction with seismic data is used to infer fluid compartmentalization. Both vertical and lateral lithologic barriers to fluid flow at tens to hundreds of meters scale are observed. Fluid compartmentalization is also evident across a supradomal normal fault. Offset of salinity contours are consistent with the throw of the fault, which suggests that saline fluids migrated before fault formation.     

浙江宁波大榭岛方墩东周制盐遗址的试掘与初步研究

方墩东周制盐遗址位于浙江省宁波市大榭开发区的大榭岛,出土了较多制盐陶器和少量日用陶器。制盐陶器均为放置在盐灶中以支撑煮盐器具的支臂和支脚,它们的制作可能已经有标准化倾向。结合遗址年代、位置、自然环境和文献记载来看,这是一处春秋晚期至战国早期由越国管辖的盐业生产聚落。     

汉口徽商与社会风尚--以《汉口丛谈》为例

从<汉口丛谈>的记载可以看出,汉口徽商与扬州徽商的基本特征还是相同的,由于地理位置的不同,也由于作者关注事物眼光的不同,我们看到的汉口徽商有着一些与扬州徽商稍微不同的生活方式和精神风貌,地域的烙印比较明显.     

明代徽州盐商盛于两淮的时间与原因

徽州盐商之所以能够称雄淮扬,基本原因难以归之于实行并不久长的弘治叶淇变法,也很难归之于万历四十五年袁世振突然实行的纲运法,而很可能应该归之于明代中后期两淮盐业的运作实态和徽商的所作所为.由边商内商到内商,到内商之有力者,到囤户,到纲商,徽商是在盐商的这种不断分化中占了先机而逐渐称雄的.     

云冈石窟顶部土层水盐分布特征研究

可溶盐是石质文物风化的重要原因,其聚集、运移与水密不可分。石窟顶部土层中的盐是云冈石质文物内部盐分的重要来源,因而研究石窟顶部土层中的水盐分布特征对未来减小可溶盐在石质文物内部的聚集具有十分重要的意义。本研究对云冈石窟顶部不同位置、不同深度土层的饱和渗透系数、含水率、孔隙比、可溶盐含量进行了系统的分析测试,并结合取土位置的坡度和植被覆盖率,研究了云冈石窟顶部土层中水盐分布特征。结果表明:植被覆盖率越高,土体含水量越高;坡度越大,土体含水率越低;土体孔隙比与饱和渗透系数呈线性关系。植被覆盖率、坡度及土体的渗透性能是影响石窟顶部土层水盐分布的主要原因。     

“北胡”“西域”盐色与丝路交通地理

汉代以来盐史记忆中已经可以看到中原人对远方奇异盐产的印象。多处盐产地盐的异样色彩,与内地以往经济生产与饮食生活中的观察体会及消费经验有所不同。关于宿沙氏“煮海”传说盐色“五样”的情节,学者以为“异闻”。许多文献资料可见所谓“紫盐”“青盐”“黄盐”“赤盐”“黑盐”等记录。这些对于远方盐色的体会,是以长途交通实践为发现条件的。而早期丝绸之路史的记录,与相关盐史迹象存在某种关联。这一情形,值得交通地理与文化交流史研究者关注。     

清初迁海前后的沿海盐场与地方宗族——以广东归德、靖康诸盐场为例

清初迁海给沿海尤其是盐场地区的社会经济带来严重的破坏,但具体影响的范围、程度和方式,却不能仅就官方文献和展界后的赋役情况轻下定论。通过广东归德等盐场及相关宗族在迁海前后的活动情况,我们发现,迁海并没有给盐场宗族主要成员造成太大的影响,相反,官方文献"盐课缺征"、"丁绝田荒"的记载,实际上是盐场家族有意识地利用迁界机遇和制度漏洞,逃避灶课、隐匿盐田,借恢复祖先祭祀之机抢占民田的结果。     

Rabbits as Food at the end of the Upper Palaeolithic at Molí del Salt (Catalonia,Spain)

Many factors have been causally linked to the diversification of hunting during the European Palaeolithic: declining supplies of high‐ranked prey, considerable human demographic growth, reduced residential mobility, larger populations of ubiquitous small mammals and significant technological developments. However, small prey exploitation was not uniform: the European rabbit (Oryctolagus cuniculus ) is the most frequent species in the Upper Palaeolithic archaeological record of the Iberian Peninsula – south and Mediterranean area – and Southern France. This is demonstrated at Molí del Salt, an Upper Palaeolithic site located at Vimbodí (Catalonia, Spain), whose mammal fauna stands out for the predominance of rabbits [91% of minimum number of individuals (n = 136)]. We analysed the faunal remains from one level [A^sup (c. 12 700–13 000 cal BP)] in order to identify the agent responsible for the faunal accumulation, and to reconstruct aspects of procurement and consumption that shed light on Palaeolithic subsistence strategies in the Northeast Iberian Peninsula. Our results indicate that human agency rather than carnivore activity was responsible for the bone accumulation at Molí del Salt. We identified all the stages in the consumption sequence from skinning to ingestion. We argue that the rabbits were mostly harvested during summer or winter or both seasons. Clearly, the European rabbit was a target species for the human groups which lived at Molí del Salt providing meat, and skin. Copyright © 2016 John Wiley & Sons, Ltd.     

曾国藩与两淮盐政改革

曾国藩是对晚清两淮盐政改革产生重大影响的关键性人物。在两江总督任上,他对两淮盐政开展全方位的改革:一是力图收复川盐济楚失地,二是在淮南推行保价整轮,三是在淮北实施改票轮售。曾国藩的改革,承前启后,是晚清盐政史上的重要环节,也成为梳理两淮盐政改革脉络的基石。虽然曾国藩的改革取得了税收上的成功,但也彻底颠覆了原有票法的精髓,并充分显示出他对市场经济的怀疑。