GRADES OF CONCRETE

 Nominal Mix Concrete:

Grades of Concrete	Mix Ratio Cement:Sand:Aggregate	Compressive strength of 150 mm cube at 28 days cured MPa (N/mm2)     Psi
M5	1:5:10	5 Mpa	725 Psi
M7.5	1:4:8	7.5 Mpa	1087 Psi
M10	1:3:6	10 Mpa	1450 Psi
M15	1:2:4	15 Mpa	2175 Psi
M20	1:1.5:3	20 Mpa	2900 Psi
M25	1:1:2	25 Mpa	3625 Psi
M30 and above	Design Mix	30 Mpa	4350 Psi

Grades of Concrete as per IS 456:

Group	Grade Designation	Specified Characteristic Compressive strength of 150 mm cube at 28 days in N / mm2
Ordinary concrete	M10	10
	M15	15
	M20	20
Standard Concrete	M25	25
	M30	30
	M35	35
	M40	40
	M45	45
	M50	50
	M55	55
High Strength	M60	60
	M65	65
	M70	70
	M75	75
	M80	80

Note:  

(1) M5 and M7.5 Grades may be used for lean concrete bases and simple foundations for masonry walls. These mixes need not be designed.

(2) Grades lower than M15 shall not be used in reinforcement concrete.

Different Grades of Concrete -- Concrete Mix Design

Water for Building Construction

 2. Water for Building Construction:

          Water used for mixing and curing shall be clean and free from injurious substances of oils, acids, alkalis, salts, sugar, organic materials (or) other substances that may be deleterious to concrete (or) steel. Portable water is generally considered satisfactory for mixing concrete.  

Quality for Building Construction as per IS 456:2000

Portable Water/River water:

          Generally, quality of water for construction works are same as drinking water/Portable water. Generally, Surface water i.e., River water is generally good for construction.

Quality of Water:

          This is to ensure that the water is reasonably free from such impurities as suspended solids, organic matter and dissolved salts, which may adversely affect the properties of the concrete, especially the setting, hardening, strength, durability, pit value, etc., The water shall be clean and shall not contain sugar, molasses (or) gur (or) their derivates, (or) sewage, oils, organic substances.

          The water quality for construction shall be tested (or) monitored regularly, as it affects the overall strength of concrete. For plain and reinforced cement concrete permissible limits for solids shall be as follows: 

Types of Solid in water	Permissible Limits for Construction
Organic matter	200 mg/l
Inorganic matter	3000 mg/l
Sulphates (So4)	500 mg/l
Chlorides (Cl)	A) 1000 mg/l for RCC work and, b) 2000 mg/l for PCC work
Suspended matter	2000 mg/l

Components in Building Construction

 1. Components in Building Construction

• Site Clearance
• Excavation
• Foundation
• Plinth Beam (or) Slab
• Superstructure Column and Beam
• Brick Masonry Work
• Lintel Over Doors Window
• Floor Slab (or) Roof Structure
• Plastering
• Door and Window Framing and Fixations
• Painting
• Electrical and Plumbing
• Exterior Finishing
• Electrical and Plumbing
• Exterior Finishing
• Internal Finishes
• Boundary Wall and Gates
• Landscaping.

Building Codes & Manuals
1	IS 456	Plain and Reinforced Concrete-Code of Practice
2	IS NBCC	National Building Code of India 2016
3	IS SP 62	Handbook on Building Construction Practices
4	IS SP 21	Summaries of Indian Standards for Building Materials

IS 456: 2000 Indian Standard PLAIN AND REINFORCED CONCRETE - CODE OF PRACTICE (Fourth Revision)

 This IS 456: 2000 deals with the general structural use of plain Concrete and Reinforced Concrete.

SI NO	Materials
1	Cement
2	Fine Aggregate (Sand)
3	Coarse Aggregate (6 mm - 20 mm Graded HBG Metal)
4	Reinforcement (Steel)
5	Plastixers (Admixtures)

          Andhra Pradesh Public Service Commission (APPSC) was formed when the Andhra Pradesh state is formed on 1 November 1956,  Earlier it was known as Andhra Pradesh Service commission (which was formed in 1953) which is based on the regulations of Madras Public Service Commission. Later in 1956, by merging Andhra Pradesh Public Service Commission and Hyderabad Public Service Commissions, APPSC is formed.

ZONE WISE DISTRICTS IN ANDHRA PRADESH APPSC

There are 4 zones present in Andhra Pradesh after bi-furcation. Earlier there are 6 zones present (AP & TELENGANA). 

Zones :

ZONE–I : Srikakulam, Visakhapatnam and Vizianagaram. (SKM, VSP, VZM)

ZONE–II : East Godavari, West Godavari and Krishna. (EG, WG, KST)

ZONE–III : Guntur, Prakasam and Nellore. (GNT, PKM, NLR)

ZONE–IV : Chittoor, Cuddapah, Anantapur and Kurnool. (CTR, CDP, ATP, KNL)

The official website of APPSC is https://psc.ap.gov.in/

 

AP GRAMA/WARD SACHIVALAYAM EMPLOYEES PROBATION DECLARATION DEPARTMENTAL TESTS

AP government specified some departmental test papers to some departments as per notification. For some departments 'No Departments' are required and  for some departments exam not specified, in this post we are going to know for which depart has to write which test paper and for which departments exams are not specified and for whom exams are not required.

AP VS/WS PROBATION DECLARATION DEPARTMENTAL TEST PAPERS

S. No	Designation	Governed by	Tests to be passed
			Departmental	Non Departmental
1	Panchayat Secretary Grade V	AP Panchayat Raj Subordinate Service Rules, 2010	Accounts test for local body employees paper- I, paper-II	Computer Proficiency Test
2	Panchayat Secretary Grade VI	Andhra Pradesh Panchayat Raj Subordinate Service Rules, 2010	Accounts test for local body employees paper- I, paper-II	—
3	Engineering Assistant Grade II	AP Panchayati Raj and Rural Development Engineering Subordinate Service Rules , 1994	Not specified by the Department	—
4	Village Revenue officer Grade II	AP Village Revenue Officers Service Rules, 2008	—	proficiency in automation with usage of Computer and Associated Software test
5	Village Surveyor Grade III	Survey Subordinate Service Rules 2001	i).Village Surveyor Paper-I, (ii) Village Surveyor Paper-II and (iii). Village Surveyor Practical Test-I	—
6	Welfare and Education Assistant	A.P. Social Welfare Subordinate Service rules 1996	Not specified by the Department	—
7	Grama Mahila Samrakshana Karyadarsi / Ward Mahila Samrakshana Karyadarsi	AP (Grama Mahila Samrakshana Karyadarsi Grade-III/ Ward Mahila Samrakshana Karyadarsi Grade-III ) Subordinate Service Rules, 2019.	Not specified by the Department	—
8	Animal Husbandry Assistant	AP Animal Husbandry Sub-Ordinate Service Rules, 2003	No Tests	—
9	Fisheries Assistant	AP Fisheries Subordinate Service Rules, 1993	No Tests	—
10	Agricultural Assistant	Andhra P Agricultural Subordinate Service Rules, 1997	The Agriculture Department Test (Paper Code 144)	—
11	Horticulture assistant	AP Horticulture Subordinate Service Rules, 2005	The Agriculture Department Test (Paper Code 144)	—
12	Sericulture Assistant	Not specified by the Department	No Tests	—
13	ANM	Not specified by the Department	No Tests	—
14	Energy Assistant	—	No Tests	—
15	Ward Administrative secretary	AP Municipal General Subordinate Service Rules, 2019	Accounts Test for Subordinate Officers – Part I and Part II	—
16	Ward Education and Data Processing Secretary	AP Municipal General Subordinate Service Rules, 2019	Accounts Test for Subordinate Officers – Part I and Part II	—
17	Ward Sanitation &Environment Secretary, Grade-II	AP Municipal General Subordinate Service Rules, 2019	Accounts Test for Subordinate Officers – Part I and Part II	—
18	Ward Amenities Secretary, Grade-II	AP Municipal General Subordinate Service Rules, 2019	Accounts Test for Subordinate Officers – Part I and Part II	—
19	Ward Planning & Regulation Secretary, Grade-II	AP Municipal General Subordinate Service Rules, 2019	Accounts Test for Subordinate Officers – Part I and Part II	—
20	Ward Welfare &Development Secretary, Grade-II	AP Municipal General Subordinate Service Rules, 2019	Accounts Test for Subordinate Officers – Part I and Part II	—

AP SACHIVALAYAM DEPARTMENTAL TEST NOT REQUIRED DEPARTMENTS

In sachivalayam system there are 19 types of posts are present in those 19 functionaries for the following functionaries No departmental test is specified. Those functionaries are: 

• ANM
• Sericulture Assistant
• Fisheries Assistant
• Animal Husbandry Assistant
• Energy Assistant

DEPARTMENTAL EXAM NOT SPECIFIED CATEGORIES

For the below departments no exam is specified in notification but recently government specified exams to these departments also.

• Engineering Assistant
• Mahila Samrakshana Karya darshi
• Welfare and Education Assitstant

ANDHRA PRADESH SACHIVALAYAM DEPARTMENTAL wise paper codes

SI NO	Name of the Department	Paper Code
1	Panchayat Secretary Grade V	146 and 148
2	Digital Assistant	146 and 148
3	Engineering Assistant	137 and 142
4	Fisheries Horticulture	095
5	Village Revenue Officer	18,27,43,62
6	Sericulture Assistant	32,65,90,115
7	Agriculture Assistant	50,144
8	Veterinary Assistant	51
9	Energy Assistant	152
10	Mahila Police (Women & Child Welfare)	08,10 (04 Optional)
11	Welfare and Educational Assistant	08,10, (optional 141)