膨润土提纯技术研究进展

膨润土是一种以蒙脱石为主要成分的粘土矿物,广泛应用于医药、化工、食品等多个领域,高纯度的膨润土具有更高的附加值。本文简单介绍了膨润土主要的提纯方法,对重力淘洗法、离心法、旋流分级法、磷酸盐法、超声波振荡法、化学法提纯膨润土技术进行了综述。     

膨润土在建材工业中的应用

本文介绍了膨润土在白水泥、墙体材料、防火材料、防水材料、陶瓷工业、粘结剂及建筑涂料等领域的应用情况。为膨润土的利用开辟了新的领域。     

信阳天然膨润土提纯试验研究

根据信阳膨润土的特性,采用湿法对其进行提纯。分别考察了六偏磷酸钠用量、液固比、沉降时间、搅拌时间对提纯效果的影响,并用吸蓝（MB）法和X-射线衍射对提纯效果进行检验。结果表明,信阳膨润土最佳提纯条件：分散剂用量0.125%、最佳液固比12、搅拌时间80min、沉降时间120min。膨润土的蒙脱石含量从61%提高到90%以上。     

膨润土在工程防水上的应用实例

通过多年对膨润土防水机理的了解，由试用到自行设计、推广，均能证明其防水效果优异（有效而持久），只要设计应用得当，不但施工简单快捷，而且造价低廉，值得继续深入研发。     

膨润土主要应用领域的发展趋势

1.油井钻探市场有恢复的迹象 1986年,石油价格下跌到每桶10美元以下,油井钻探用膨润土的销售受到严重影响。近来尽管某些特殊应用领域中膨润土已经被高聚物代替,但水基钻井泥浆仍然要求添加膨润土,因此钻井用膨润土的需求量仍取决于钻探的油井数和钻井深度,即仍取决于石油价格。预计1988年下半年,石油价格不会上升,欧洲和北美洲1988年4—5月份的石油需求量波     

膨润土的防水机理及其应用

膨润土作为抗渗防水材料在我省首次应用,本文重点探讨膨润土的防水机理、特 性及在建筑防水中的应用。     

大青山东段火山成因膨润土矿床中蒙脱石的矿物学特征研究

本文通过对大青山不同型成因类型的膨润土矿床中蒙脱石矿物学特征的详细研究，揭示了蒙脱石的一系列矿物性质间的联系，包括Ｘ射线衍射特征，晶体化学特征，差热分析特征，同时，探讨了不同类型蒙脱石（切脱型，过渡型，怀俄明型）与矿床在因类型，成矿原岩的依存关系。     

膨润土及其与砂混合物的膨胀试验

用固结仪完成了膨润土及其与砂混合物的一系列膨胀变形试验，由试验结果得到了蒙脱石孔隙比与上覆压力的通用表达式。试验结果表明，膨润土及其与砂混合物的膨胀变形特性与试样的击实条件有关，膨胀变形试验结果反映了膨胀矿物与水的相互作用。     

节水工程在津南区农业中的应用探讨

从节水工程建设情况、工程模式、效益三方面分析了节水工程的现状,并详细阐述了节水工程在津南区农业建设中取得的经验,提出了加强水资源保护和节约利用的相关建议,以达到利用有限的水资源发展好节水型高效高科技农业的目的。     

西安市发展秦岭北麓农业休闲观光旅游应注意的问题

秦岭北麓不仅是陕西省乃至全国旅游资源密集带之一,一直被称为古长安的“后苑”,而且还是我国传统的农业耕作区,农业经济发达,具有从事林果种植、淡水养殖的优良条件,非常适宜发展农业休闲观光旅游.通过对西安市发展秦岭北麓农业休闲观光旅游的优势及可行性的分析,提出了西安市发展秦岭北麓农业休闲观光旅游应注意的问题.     

农林院校城市规划专业培养模式探索

城市规划专业在农林类院校属“非主流”专业,而农林类院校设置城市规划专业的初衷往往源于社会需求和已有办学资源。文章结合福建农林大学城市规划专业的发展特点和学生就业特点,以及地域性人才需求特点,提出特色化的城市规划专业培养模式。     

浅谈兵团农业利用信息化的发展方向

论述了农业的发展在我国国民经济中所起的作用,介绍了利用现代信息化技术改造传统农业的必要性,提出了新疆生产建设兵团农业利用信息化,采用精准农业技术的发展方向。     

生态农业观光园规划设计探索

针对生态农业观光园规划设计,结合项目实例,阐述了农业观光园规划的区位分析、资源分析、发展战略定位、规划理念、规划构思等问题,从而使生态农业观光园规划设计更加完善。     

A survey on the impact of motorways on agriculture

This paper looks into the ways in which farmers and farms are affected by motorways running through or near to their land. The investigation was based on an extensive questionnaire covering many aspects of farming. The more important of these questions are described and discussed in the text. Two farming communities were investigated; one near a newly opened motorway, the other, near a motorway which had been open several years. The two groups are compared in the text.     

The urban nature of agriculture: Bidirectional trends between city and countryside

The paper presents a wide range of images, contexts and issues related to contemporary forms of urban–rural interface. The urban and rural environments come in contact in various ways, generating patterns with hybrid identities which can be read both on a regional scale (in those cases where cities merge to form megapolitan conurbations), on an urban scale (suburbs of the cities), on a settlement scale (city quarters, farmyards and farmsteads), and even with regards to single buildings. This creates manifold diversified configurations of interface spaces, showing seemingly opposite trends. This work focuses on these bidirectional trends, which are discussed by means of a selection of different concepts, images, projects and experiences, within the international context. On the one hand, an increasing number of projects insert what is commonly associated with the idea of countryside into the cities: urban agriculture, mainly located in periurban open spaces, but in some cases even within the built system through various forms of integration with the building envelope, in line with a growing sensitivity about the need to conceive ways of virtuous relationship between food production, consumption and environment. On the other hand, town planning in many cases “ejects” the spaces for business and leisure, locating shopping malls, entertainment and (agri)tourism centres within the countryside. Moreover, typical rural spaces and activities (farms, farm holidays, wine farms, etc.) often refer to urban styles, due to poor design attention, or rather to marketing strategies aimed at enhancing the farm image. Thus, settlements located in rural areas show markedly increasing urban characteristics, with regards to their built environment, open spaces, and outdoor furniture. Whilst many scholars and designers have focused on reinterpreting the agricultural functions when these are inserted in urban architecture and built areas, further interdisciplinary work is needed to analyse how urban functions can be brought into the countryside and improve the quality of rural settlements.     

农林院校“大土木”实践性教学问题研究

文章从加强"大土木"人才实践能力培养力度的社会要求出发,对"大土木"实践性教学问题进行研究。通过分析本科专业调整以来的教学经历和毕业生反馈意见,并立足于农林院校现有的人才培养模式和运行条件,对"大土木"人才实践能力培养质量的影响因素和提高措施进行论述。分析表明,从毕业设计、生产实习、课外科技活动、课程考核手段和教学条件建设5个环节入手,提高"大土木"人才实践能力具有很强的现实必要性和可行性。     

CDIO模式下农林院校城乡规划专业实践教学体系改革

文章借鉴国外CDIO工程教育模式,针对农林院校城乡规划专业实践教学现状,以华南农业大学为例,提出构建多层次理论知识体系、注重综合实践技能训练和培养良好职业道德素养的农林院校城乡规划专业CDIO模式开放式实践教学体系。     

生态文明建设中的农林院校城乡规划专业教育特色化

生态文明建设是当前中国城乡建设的重要内容,其对城乡规划建设有三方面的新要求:城乡统筹的规划体系,多规融合的规划管理以及对生态、绿地等要素的重视。文章针对生态文明建设时期城乡规划专业的需求变化,结合农林院校在风景园林、国土研究、乡村研究等方面的学科优势,提出农林院校城乡规划专业的特色化教育应重点放在三个方面:生态景观设计、土地利用、乡村规划。