Phosphogypsum was chemically pretreated by using lime solution,ammonium hydroxide,and aqueous citric acid solution,respectively.
分别用不同浓度的石灰溶液、氨水和柠檬酸溶液预处理磷石膏,测试预处理磷石膏的杂质质量分数及DTA曲线。
As constructing the tunnels with soluable calcareous rocks whose geological con-ditions are complex, the outflow,mud-flow and surface collapse are usually occurred,caus-ing the construction of tunnels and later thc maintenance in traffic extremely difficult andhardly to be brought under control.
石灰岩溶地质复杂，隧道施工中常见涌水突泥，地表坍陷，给施工与运营造成极大困难，整治也十分艰难，本文介绍多年来岩溶隧道施工的经验和教训，提出施工中的主要问题和应采取的对策。
The relations among the different condition,lime content and ages in lime-ash soil construction process are drawn,which can provide reference for construction units to grasp its changes rules,and lay a foundation for making feasible construction plan and measurement criterion.
通过室内试验对二灰土在恒温箱低温养生、养护室标准养生和暴露养生这三种养护条件下石灰剂量的衰减规律进行试验研究,得出的二灰土底基层施工中养护条件、实测灰剂量与龄期之间的相互关系,可为施工单位掌握二灰土石灰剂量变化情况提供依据,并为制定出科学可行的施工组织计划和检测标准打下基础。
THE FEATURES OF KARST CAVES IN LIMESTONEOF TIANGUIYAN,GUANGFENG COUNTY AND ITS PROSPECT FOR TOURISM DEVELOPMENT;
广丰县天桂岩石灰岩溶洞特征及旅游开发远景
The pile foundation construction technique at dissolution lime-rock area for the trestle bridge of Huaqing Express Highway are introduced.
介绍花清高速公路高架桥在石灰岩溶岩地区的桩基础施工技术。
REGULARITIES OF KARST WATER OCCURRENCE IN LOWER CARBONIFEROUS, JINGTAI COUNTY, GANSU PROVINCE
甘肃省景泰县下石炭统灰岩岩溶水的赋存规律
Study on Driving Effect of Plant Carbonic Anhydrase on Dissolution of the Limestone;
植物碳酸酐酶对石灰岩岩溶的驱动作用研究
Induced porosity is typified by fracture development as found in some shales and limestones and by the vugs or solution cavities commonly found in limestones.
次生孔隙度是以某页岩和石灰岩的裂缝和石灰岩中的岩穴和溶洞为代表。
Burial dissolution of Ordovician granule limestone in Tarim Basin
塔里木盆地奥陶系颗粒石灰岩埋藏溶蚀作用
Rock, usually limestone, composed of oolites.
岩石岩石，通常指石灰岩，由鲕粒岩组成
Research on Karst Characteristics and Its Hydrologic Property of XiGuoDing Limestone Deposit in Ning-Zhen Mountain;
宁镇山脉矽锅顶石灰岩矿床岩溶发育特征及其控水性研究
magnesian limestone
白云石, 含镁石灰岩
Effect of Karstification on Concentration of Zn~(2+) in Lime Soil Water at Huixian Guilin
桂林会仙岩溶作用对石灰土壤水锌离子浓度的影响
sedimentary rocks,eg sandstone,limestone,slate
沉积岩（如砂岩、石灰岩、板岩）.
Rock, usually limestone, composed of pisoliths.
豆石，豆岩由豆石构成的岩石，常为石灰岩
Taian city belongs to north limestone area, and is a place taking karst ground water as source of water supply mainly.
泰安地处北方石灰岩地区，是一个以岩溶地下水为主要供水水源的城市。
There are four principal types of limestones.
石灰岩有四种主要类型。
Robeston Wathen limestone
罗伯斯顿·瓦辛石灰岩
dolomitic biomicrite
白云石质生物微晶灰岩
A small round calcareous grain found, for example, in limestones.
鲕粒岩含有圆形小颗粒的石灰质岩石，如在石灰岩中
Limestone is rock composed of calcium carbonate.
石灰石是由碳酸钙所构成的岩石。